Corporations live outside the law for the most part.
Discussion
1st Amendment only applies to the government.
Private means you have the right to exclude whatever you want for whatever reason you want.
Twitter is a private company.
This is the way it is supposed to be.
Commies are the ones that want to abolish the private exclusion. They want inclusion in everything. They want to be included in your money, your private property, your private spaces, your status, your earned glory, etc., etc., without doing anything of merit themselves.