Some "ideas" - pedophilia for one, should never be given air to breathe. We must oppose a "no fault, anything goes" mind set. Many taboos have been generated appropriately.
Common sense refutes that every idea must be given a hearing, deliberated on, tried. That is pure misguided, mindless, liberal malarky.
Summary rejection of some "ideas" is warranted. Ever try putting poop in the Brownies batter?
So, shun people like Milo Yiannopoulos & his ilk, but be ready & willing to prosecute those who practice pedophilia & other twisted perversions.  It's good that CPAC disinvited that one.
As for Muslims, spend time to read the koran, learn what the core tenets of islam really are. No rational person can embrace that malevolent theocracy.