In the west, we have a live and let live attitude toward other religions (for the most part); however, Islam is an all or nothing deal. There is no tolerance for other religions.
Of course many Muslims are nice and pleasant. That's their MO until their population grows to critical mass. When that happens, as it's begun to in Europe, watch out because they have one objective: world domination, and that does not fit with the American way, democracy and religious pluralism. Sharia Law is how they will manage it.
Islamic ideology is incompatible with democracy.