That story was a yawner. These Jews are culturally completely Russian. The sitch is totally different from the pre-war years, when you had an interesting & explosive situation of settled, assimilated German Jews, who were in a process of leaving the community more or less, but whose numbers were constantly being enriched by a steady stream of Jews from the east. In this case you've just got Russians of Jewish origin who are moving to Germany. They'll soon assimilate.

The geographical shifts and reconcontrations of the Jewish diaspora of late are interesting--very rapid growth in Germany, relatively rapid growth in Israel, moderate growth in Canada, stability with some assimilation in France, Russia, and the United States, and declines of various speed everywhere else.

That's 'Deutsche Juden'.
I didn't see any mention at all in the article of grumbling against the Jewish immigrants. I suppose that's a kind of underemphasis, but do you have a separate source for that? Not that it would surprise me given that 2/3 of them are on welfare - I don't think the US has any immigrant group with a comparable rate. Of course Germany has crazy generous social programs, so it's no wonder people want to settle there.
And as regards 'enough is enough...': ever heard of the White Rose? Or how about this: http://www.joric.com/Conspiracy/Center.htm

my source is the economist a few years back. not a big upwelling-but some CSU people were starting to get concerned with the open-door policy toward jews.

fixed spelling.