Employers may not discriminate based on these things. They can let you go for what you say. It's called employment at will and I should have the right to remove someone from my private company who is toxic to our culture. If someone is acting unprofessional, I can see no way to force the company to retain them.

This is completely separate from private publishers and platforms. Should a magazine or news paper be forced to publish anything? Does YouTube not charging you for producing content somehow change their relationship?