What's the point of banning a style of clothing and not deporting the people doing the murdering and raping?
Germans have a lot of baggage when it comes to that. Since the end of WWII they have been fairly open on letting immigrants some, stay and provide social welfare to them. Turks in the 80's/90's were the first big group. (Although many Turks arrived in the 50's and 60's when the German economy was going gangbusters and they need labour, any labour to keep growing.)
I can imagine how displease they are, but are really, really trying to hold back their inner jack-boots. Again, if Syria winds down, the Germans would be more than happy to ship them home while sending piles of cash to Syria to "help".