This is not unlike the fact that anyone with an IQ exceeding that of a rabid animal can become a preacher (Imam), as long as the "congregation" accepts it. Thus this gutter "religion" gives the evil ones a wide birth. IMO, it is WE who should decide what is permissable by these heathens. For example, any Mosque that is used for support of terrorism should be obliterated. Just like any Imam who preaches sedition should be executed. Keep destroying their assest and keep killing the monsters in the "leadership" until the rest finally stand down. By the way, this has been necessary before. Islam is pure evil.
Personally, I wouldn't stop even when the "stand down" occurs.