He will probably be hunted down and “punished” or even killed for expressing his views on Islam. In the U.S. His view would just be considered an opinion if he were talking about Christianity. Sure he might be scorned but he would not be beheaded for his beliefs. That’s the difference between the Muslim and Christian faiths.
Then there’s also that nobody is permitted to leave the ‘religion’ without punishment of death. Truly I don’t understand why we tolerate it here.