Do people have a right to believe anything they want, even if that belief is dangerous?

I read an interesting article this morning in which the author posits that we don't have the right to believe whatever we want to believe if those beliefs fly in the face of facts ("The earth is flat!") or are morally repugnant ("Ethnic cleansing is a reasonable political solution."). What are your thoughts on the issue?

https://aeon.co/ideas/you-dont-have-a-right-to-believe-whatever-you-want-to