Americans have the constitutional right to be wrong (in religion as well as in politics). However the KKK and American Nazis are stopped from acting on their beliefs of racial intolerance and even from preaching violence.
The political-religion of Islam should be held to these same restraints. Those mosques that fund terrorism are prosecutable under RICO.
Several Islamic so-called "charities" have been shut down and their officers indicted, since September 11th 2001, for funneling money to terrorists.
That is not a problem. Indeed, it is a Good Thing.
The serious proposals bandied about by some posters here, though, of making Islam illegal in the United States, and of "invading their countries, killing their leaders, and converting them to Christianity" overseas, however, are unacceptable.
And who is arguing against that?