I'm sorry I don't know more about the political situation in Germany (I've been caught up in the mess here at home), but I have one general observation:   in modern times, politicians seem to spit in each others' faces figuratively as a matter of course. I guess it's a short step from that to doing it literally.

Rational debate about real issues, which should be the focus of politicians prior to elections, seems to remain outside the realm of politics. It's a strange world we live in.

Don Firth