So, it's true that the Constitution doesn't protect rights from infringement by private businesses, but you're onto something important. The rights of free speech and free assembly are critical to a functioning republic, and their curtailment --- even legally, and by private corporations --- is doing great harm to our tottering system.

I don't want government to force businesses to allow speech, but we need to actively oppose private enterprises when they limit speech, and support alternatives that embrace freedom.

Websites have always moderated incoming content.