As a matter of fact, there are cases where church buildings of denominations other than the Copts were attacked. Only about two weeks ago, a Catholic church had to accept the enforcement of the street vagabonds—who are groups of religious associations—not to put domes or crosses on the building. It's a culture. Please allow me to say that it was there, but it was suppressed to some extent by the regime of Mubarak because they used these people against the Muslim Brothers. The security apparatus under Mubarak used certain Islamic groups called Salafis and Sufis against the Muslim Brothers for political reasons. That's why now, after the collapse, they go out openly and do whatever they want.
On November 15th, 2011. See this statement in context.