Why do we not see similar "outraged" public protests in the US? Because they know that we won't cave to that sort of threat. Oh, the government may, but the people won't. If Muslims here demanded no pictures of cute puppies, everyone would be wearing puppy shirts the next day. That is how you stop Muslim outrage; let them know that this is our culture, not theirs, and if they push us to submit, we will take 2 steps in the opposite direction.
This is about making the kuffars jump through hoops to demonstrate the Muslim community's power over and contempt for them. It's a preview of things to come once Muslims are in the majority.
These two comments succinctly explain the crux of this issue: it's all about power. This is cultural warfare (jihad) being waged by exploiting the enemy's (the West's) own cultural weaknesses (e.g. the fetishization of "tolerance" & "diversity").