Sorry, haven't noticed anything like this. We usually decorate the cities with huge light chains in the pedestrian zone, a christmas market and other things.
So far I haven't heard about any complaints and it's not unfair either since the muslims had their ramadan tent as well and we can all just enjoy the atmosphere, can't we?
All that banning and sueing in your anglo-anmerican cultures is just weird and means people just don't understand the message.