Not in that way actually.
Whoever did this is evil, seems like a lot of people almost want it to be Muslim extremism. It's certainly extremism, whatever type though, we just don't know yet.
However, the guy was shouting about foreigners, saying he was German.
I'm no detective, but it seems...
I've a feeling these could be right wing nutters, just a feeling after seeing something just seen on the tv. Guy in black shooting a pistol, might be OB firing after the bad guys of course.