It really is an almost impossible situation. The far right will win this one regardless what the government does. If they do nothing we will probably see some form of terrorism sooner or later, if they clamp down on it they will prove the activists right in that the government will reduce freedom of speech just because some muslims cant behave.
Maybe theres some way to eke out a win but I cant see it.
For the absolute majority of communication, calling goes waaay faster. The main upside with writing is that "you have it on paper". Most of my phone calls are very short and to the point at least.