Muslims who believe in liberty over Islam can, and often do, repent. When that happens, the nice Muslim has a reason to kill you. We can call some Muslims radicals, or call devotion to Islam believing in “Islamist theocracies,” but it all boils down to Islam, and what Muslims feel they must do to please their god. Muslims are unpredictable, as we find out over and over again when we trust them. The most secular of liberty embracing Muslims can come to fear their meeting with Allah. If cutting off a head, or shooting Western comrades is what it takes to get them in the good graces of their god, hope you are not their target. ...But you are.
Why would any thinking person trust a muslim? They even kill each other.