Jejudo, South Korea
Now in the West insulting the prophet is allowed, but questioning the Holocaust is considered a crime
This has come up a few times in places and not just from Muslims.
It is wrong. You can indeed question the holocaust and you don't go to jail, pay a fine, or stay after school.
Remember the Christ in urine picture? How many protested that?
The difference isn't in the protest, it's in the vandalism and the shift from protesting the act to protesting the protestors.
It's a distinction the West finds difficult as well often enough.