Why don’t they try this with Muslims? If they did I (might) have more respect for them...maybe.
They DO protest against Islam in front of Mosques.
They had a major protest against Islam in Paris and Germany just a few weeks ago. See Femen stages a topless jihad (warning: has pics, not safe for work). FR thread from April 5
Topless Jihad in Kiev (above) in front of a mosque.