Our constitution which I pledged to defend valiantly (hand on the flag of the loyal and valiant Hessian Jaeger Battalion - do you remember Flatbush in 1776?) starts with:
The dignity of man is untouchable. To respect and to protect it is the duty of the entire governmental power.

The following 18 articles are concerned with the Human Rights which are basic for the Constitution of a free republic. Religious problems are not the concern of the government if they do not concern the criminal law. So let it be.
Spitting out invectives against those unlucky muslims is a violation of their dignity, too.
The sharia is thought to be partly revealed to man (viz. by Archangel Gabriel to Prophet Muhammad) and partly follows the deeds and sayings of the aforesaid prophet. For us westerners they cannot be the base of a free constitution; the human rights prevail.
So we have to take a firm stand, but without dirty insults.

Behave!