Germans wrestle with multicultural identity

What does this tell us, and what conclusions can be drawn here?

The most obvious and the most telling explains why 2nd 3rd or 4th generation descendants of immigrants sometimes behave like they do.
Their parents fitted in, worked like hell, adapted to their new surroundings and tried to better themselves, but still got treated on a regular basis like excrement.
How on earth would someone expect a positive reaction from native born descendants of immigrants when they and their parents are still treated as dumb thieving foriegn scum by ignorant bigots who only deal in stupid meaningless stereotypes.

just because there is some economic crisis and the typical radicalization coming with such times there is no reason to throw understanding and common sense out of the window for the sake of simple/convenient conclusions

Well said.
Common sense does tend to go out the window very easily.