What happened should be in every euopean nations consience, and generally is.
Generally in the German society there is a wish for security. The local authorities are made responsible for it. Other forms security are similar important: Not being poor, staying heathly, having enough to eat, ... These are also typically the more important topics at elections.
There is some background influence from WWII. The wish for security (not the security where the individual is responsible) and good government is a reaction. Another reaction is the work ethic.
a) Your comment does not make sense: People only very few people who commited any war crimes in WW2 are even alive anymore. Germans these days learn about it in history class. While it still has some influence on their attitude towards nationalism, it is unlikely that it has any influence on their general aggressiveness.
b) This is a sensitive issue. It might have been considered offensive.