People make a great leap of generalization when they make the case for anti-semitism (I do dislike that word, it does not mean what it literally means) to be a uniform phenomena. It was categorically lacking in India. In fact many a Indian not so educated in world history would go "Huh!" in bewilderment if one makes such a claim. I find many Jewish people in US are unaware of this history, particularly the right wing kind.
I remember attending a Jewish student gathering organized to mourn the death of a Mumbai Rabbi killed in the Mumbai terrorist attack. Us new Indian students left with a lot of head scratching because of the strong singular rhetoric that permeated the gathering. It was that of Jewish population being persecuted everywhere (hinting that the same is true in India and in particular was true for the Rabbi) and the need to stand up, resist and confront that. Not a word about others who lost their lives in that terrorist incident.
It was a bit awkward. No ill feelings, just a bit of head-scratching "OK, if you say so" bizarre.
Because they have been in India for so long, they don't "look" Jewish (ie, not like Ashkenazi or Sephardic or Mezrahi groups), so they aren't considered "real" Jews. Only recently have they been able to "prove" their status with blood tests.
It's all very sad.
Indeed, ironic perhaps because Israel commits some of the same mistakes against minorities as many Israeli citizens experienced as a minority group themselves in other countries.
The plight of the Ethiopian jews in Israel (Beta Israel) for example is riddled with controversy. Just recently there was the birth-control issue[0] which is quite shameful.
[0] http://www.forbes.com/sites/eliseknutsen/2013/01/28/israel-f...
Racist Israelis Protest Against African Refugees! "N*ggers Go Home"
http://www.youtube.com/watch?v=2ohJD7-zi7U
(Israelis, in Tel Aviv, protest a High Court ruling that declared internment camps for African refugees are unconstitutional)
Edit: Reversed word choice
Just because a thing can be duplicated doesn't mean it has been, and just because something was once available doesn't mean you'll have any luck finding it today.