Muslim street prayers is now a fairly well used and documented provocation across Europe. The idea is to do a highly aggressive and threatening act in public yet make it look like an act of piety, so that any response to it other than total submission to the subversion of public space to Islamic purpose, appears to be an aggressive and anti-freedom act, as well as a breach of their rights to freedom of religion and making the Muslims be both the aggressor and victim at the same time.
It is quite a treat to see Germans not falling for this the way the British and French have been so far. Feb 8 2014
Listen to German observers whistle and otherwise also make their feelings known.
Below, German Defense League against Salafists from feb. 10:
More German Defense League: