They claim to revere Jesus as a prophet, but preach against the beliefs of those who follow Him. Their inability to understand the Trinity causes them to call Christians polytheists. They claim to tolerate Christianity and Judaism, but their tolerance is a hypocritical one. America is not based on Islamic principles, nor is islam even compatible with democracy.
As I have said before here, Thomas Jefferson, whose fear of the Catholic Church caused him to make a speech about separation of church and state, was proven wrong about the Church. But, if he had known about islam, he would have made sure the actual phrase "separation of church and state" written into the Constitution. For islam and all it stands for is precisely what he most feared and hated.