Earlier quoted context omitted.
I was going to post a comment directly disagreeing with this, and citing the large number of Jewish dating sites, but these are really only used by people on the more religious end of the spectrum, so it is possible that the effect is more prevalent in the Hindu-Hindu match calculations than in Jew-Jew match calculations. I would posit, however, that this effect, along with the self-selection bias of using a multi-cu…
JDate and similar sites aren't exactly religious. There are lots of secular Jews who would prefer to date or marry another Jew, for ethnic, cultural, or national reasons.
True, I think part of the confusion stems from the fact that you can have "secular Jews," since the Jewish way of life seems to be a bit more than just about religion (not saying the religion isn't an important part of it). If someone were to say "secular Christian" I'd look at them funny.