Will I encounter any problems as a recognizable Jew in India?

There have been Jews in India for 2500 years, and largely without experiencing anti-Semitism. Even if there was a sudden, historically unprecedented upswing in hostility or violence against Jews, it wouldn't affect you personally. While you may regard yourself as obviously Jewish, in a country with thousands of different ethnic and cultural groups, you would need something a lot more noticeable than a little yarmulke to stand out.

You will find it a little weird though, that almost every taxicab you get in will be decorated with swastikas. You can keep reminding yourself that the Nazis appropriated the ancient symbol of life and peace, but it only helps a little.

If you are in Hyderabad -- and feeling particular edgy -- you can drop by here for some shisha.

Probably not. It seems very unlikely.

First of all, India is quite a multicultural society with hundreds of various creeds and lots of religions. There is a longstanding tradition of being tolerant to other religions.

Also, there is very little antisemitism in India, see the quote at the bottom of this answer.

Moreover, I don't think many people would notice and care that you are Jewish. I've met lots of Israelis in the Indian town I live in. My experience is that the local people mostly just regard them as Westerners, and not particularly as Jews. I personally think this would be the case even if they were to wear kippahs, etc. I know the local language, and the same words (Westerner, foreigner, white person) are used whether they are referring to an Israeli, Norwegian or Australian. This is also the case if they know the person is Jewish or Israeli. So, I don't think they even think of Jewish people as a group distinct enough for it to matter.

Of course, lots of Indians will recognize a kippah and other Jewish marks and know what they mean, etc. But the mentality here is just not one where people care about such things. It's such a diverse society already.

The common mentality here is to keep one's own religion and traditions to oneself and let others keep theirs.

I agree with Nikhil's comment that it would probably be somewhat unwise to walk around in a large-city Muslim neighborhood dressed in orthodox Jewish attire in the middle of the night. But that's a rather extreme example. Also, I think even that would probably be fine, though. The vast majority of Muslims in India are very polite, friendly and like to mind their own business. I don't think they'd even care if an orthodox Jew walked through their neighbourhood. To err on the side of caution, though, perhaps there are wiser ways to spend one's holiday. So, let's forget about the extreme example.

Large numbers of Israelis and other Jewish people travel as tourists in India every year. I'm not aware of even a single case of religiously or ethnically motivated harassment of Jewish travelers by Indians. (If it occurred, it was probably just because they were foreigners, not in particular because they were Jewish. But note that Westerners are also generally treated very well, so even that would not be a common or big problem.) Most Jewish people traveling in India probably don't wear kippahs or otherwise look obviously Jewish, but I don't imagine it would be a problem even if they did. To be honest, I think they'd be treated pretty much like other Westerners. (Respectfully.)

I personally know an elderly Russian Jewish man who visits India every year, and he always wears a special Jewish hat (I don't know exactly what it's called, only that it's not a kippah). I'm not aware that being Jewish has been a problem for him even a single time.

If you're worried about it, you can avoid discussing religion and politics while you're in India. However, I think even this would mostly be fine. As long as one doesn't go around invasively preaching or getting into theological or political arguments, it should be absolutely fine. I see India as a very religiously tolerant country.

Frankly, I'd be slightly more concerned if you were a Muslim (even though India has a large Muslim population), but even that would mostly be totally fine.

Source: Having lived and traveled in India for five years and talked to many Jewish and Israeli tourists and expatriates about their experiences here.

If you try to google "antisemitism India", you'll find nearly no contemporary examples. (And not much of signifigance historically either.) There's a 2010 article from the Jerusalem Post called 'We are not frightened, there is no anti-Semitism in India'. The background for that article was that there had been a bombing of a German bakery in Maharashtra and there was speculation that a Jewish religious center down the street might also have been a target. However, the article presented it as a mere possibility and not a fact.

Rachel Kupchik, the leader of the religious center, noted:

India is a country with absolutely no anti-Semitism. There never was, and there isn’t now. Unlike in some European countries, where you have to hide the fact that you’re Jewish, here in India being Jewish generates respect.

While we should generally be careful with blanket statements such as these, I think Kupchik's sentiment is mostly correct. And she is clearly in a position to know, as a long-time Jewish resident of India who interacts with other Jewish people in India on a regular basis. On a side-note, I'm also unsure of which European countries she's referring to, but she might have meant some isolated areas in some European cities.

As someone who traveled to India before with identifiable Jews (I'm secular myself). Me and fellow travelers in my party have found Bangalore to not be risky for Jews. I've also talked to several travelers since and they confirmed this.

A more official source is the Israeli government's anti-terror office which issues travel warnings in Israel. It's in Hebrew but you can look at the map and see there are only travel warnings in Kashmir in India at the moment (I think Kashmir is a little marginal, and a little dangerous for Jewish travelers in my opinion based on anecdotal experience).

In fact, India is a very popular travel destination in Israel and many Israelis visit there at least once in their life.

That said, you should be careful in India and also read about the cultural differences between the western and Indian culture. It's a beautiful place with many kind people but I recommend reading about it and trying to understand the culture in India and south India in particular.

Bangalore itself is huge and if you stick to the "good parts" you'll be just fine - just be prepared for the cultural shock since India is very different from Israel or Canada.

Absolutely not. India is very tolerant toward other religions. I myself have been there with my Jewish friend. There was this one kind old man who was having trouble carrying some sort of crate. My friend, Erik, rushed over to him and helped him out. The man was of Muslim faith, and he blessed Erik in a language I know: Hindi. Erik went all over the town helping people, Hindu and Muslim alike, and no matter what religion or culture they were, these people thanked him (even if they were in different ways). I even noticed that the daughter of one of these people Erik had helped actually liked Erik, as in fell in love with him. Unfortunately, Erik and I left a few weeks later, and the girl's heart must have been broken. My point is, nowadays you don't have to worry about being in danger because of your religion. I understand all this racism and extremist trouble, but every man/woman has the right to express his/her beliefs, and every country, including India, respects that. Any country who doesn't, ought to. In fact, the very idea of people having fears about travelling to places of vast quantities of people who are not of same religion/beliefs as themselves is disturbing to me. No offense intended, @Daniel. Just make sure you don't get weirded out by symbols that other cultures stole from Hindi and Sanskrit, such as the Swastika symbol. The swastika symbol itself has a very good meaning, but the Nazis changed a beautiful symbol of love and peace to a dark, terrible symbol of hatred and despise. Good luck with India. Just a tip, it's extremely crowded there.