Here is the picture by the satirical group "Surrend" that forced a Berlin art gallery to shut down because of Islamic threats.
It shows the Kaaba in Saudi Arabia with the caption "Dummer Stein", meaning "Stupid Stone."
But what is more interesting is that it is part of a series of "Dummer" posters. The one next to it shows a Chassidic Jew and is called "Dummer Hat." For some reason, there were no death threats about that poster.