Christians and Muslims: What do you think about this quote by Carl Sagan?

If we’re absolutely sure that our beliefs are right, and those of others wrong; that we are motivated by good, and others by evil; that the King of the Universe speaks to us, and not to adherents of very different faiths; that it is wicked to challenge conventional doctrines or to ask searching questions; that our main job is to believe and obey – then the [witch] mania will recur in its infinite variations down to the time of the last man.