“Jews of no religion are much more likely to be in mixed marriages; just 21% of married Jews of no religion are married to a Jewish spouse, while 79% are married to a non-Jewish spouse.”
“Among respondents whose current, intact marriage took place in 2005 or later, 58% have a non-Jewish spouse. A similar number of those who got married between 2000 and 2004 are also in mixed marriages, as are 55% of those who got married in the late 1990s. Intermarriage rates are lower for those who have been married longer.”
http://www.pewforum.org/2013/10/01/chapter-2-intermarriage-and-other-demographics/
None of these are in themselves bad things. But if you want to keep your people distinct, they’re utterly disastrous over time.
Lots of ethnic groups have disappeared into “white Americans” due to intermarriage and assimilation, and that’s not necessarily a bad thing. My family used to be Swedish, German, Dutch, English and Scotch-Irish, among others.
Now we’re just white Americans, and I’m fine with that.
But then none of us ever claimed to be the Chosen People.