I know the world is round. I don’t have any obligation to defend that idea because facts support it. In the past, it was believed that the world was flat. Anyone who believed otherwise was considered a heretic by the religion of their day. Beliefs do not conform to facts.
If I call someone a “lying whore,” and that someone is believed to be sent by God, then I could be killed for blasphemy. I do not have to defend facts. They speak for themselves. Only beliefs must be defended. This principle can be applied to a lot of current events, including the Muslim attacks on Christians and Jews.
We all need to evolve beyond beliefs into knowledge, and stop bullying and killing each other in defense of beliefs.