These liberals are just like muslims. They won't allow or tolerate anything they don't approve of.
You are very observant. Liberalism today is as much a faith as Islam. Both guard their beliefs zealously and will have no other Gods before them. They both seek to punish heresy and apostasy. They both reject reason in favor of faith alone, and deny individual liberty in favor of group needs. At the moment, as constrained by our Constitution, Liberals use the tools of ridicule, social control, legislation, and judicial fiat to accomplish their ends. Because Islamic powers have no equivalent constraint, they tend to just use brute force.