So I was going to write all that (whoops!) and then I saw this via LGM -- it's entirely unrelated, but puts me in a less charitable mood.
The Prime Minister's Office and the Jewish Agency unveiled an aggressive advertisement campaign for the Masa project which is designed to strengthen Jewish identity among youths in the Diaspora and their bonds to Israel.See Dana Goldstein at Tapped as well.
One video clip likens Jews who marry outside of the religion to missing persons, with fake notices and pictures which drive home the point.
As part of the campaign, similar "missing person" notices will be plastered on walls around the country.
Of my Jewish friends, almost none have settled with other Jews in their lives. In one case, a wife converted because it was important for the Jewish husband, but she surely wasn't Jewish when they started dating. And of course, some of my friends are themselves products of heterogeneous marriages. For their parents and spouses to be likened to kidnappers by the Israeli government makes me... well, I'm gonna go with "less charitable" and leave it at that.
Slightly more charitable update: I suppose the alternative explanation is that Jews who marry out of the tribe are runaways, not kidnapped, but frankly the entire analogy is just one big bag of fail -- consider how often, for example, runaways are fleeing abuse at home?