It is not just a few muslims talking and acting this way. It is thousands if you believe news reports across the globe. Muslim clerics are preaching violence in their places of worship in Saudi Arabia. When this kind of talk is so widespread, just claiming that it is a "minority" distorting Islam no longer works.
People who don't know better claim that the radical moslems (taliban etc) are the problem and most moslems are ok. The truth is that the radical moslems are actually following their scriptures correctly. The peaceful moslems are not really moslem because they ignore their scriptures. Any moslem may decide to really get serious about their faith and then we have another terrorist on our hands.
The Christian scriptures however forbid murder, conversion by the sword (implicitly) and lying. A good Christian will be a good person while a 'good' moslem must be an evil person.
Islam is the enemy because islam commands its followers to commit evil acts against us. Islam is incompatible with freedom and therefore is incompatible with the U.S. Constitution.