The Bill Maher clip has to be watched to be believed. Not the guest’s attempt to obfuscate.
The fundamental issue is simple: most non-Muslims don’t care about Islam or Muslims so long as Islam and Muslims don’t impinge upon their lives. We don’t care about the heterogeneity of Islam or history when faced to real and present fear about the violence currently associated with the religion. By analogy, non-Buddhists who live in Sri Lanka or Myanmar could care less that Buddhism is really fundamentally a religion of peace. To non-believers the ideals of a religion don’t matter, the realized actions of the religionists do.