I hope in time, people will just shut down their accounts.
It’s not a “public forum.”
It is a corporation that is there to maximize return on shareholder value. If you are an officer in that company and you do not adhere to that rule, they will fire you.
So, an individual does not have constitutional rights on their service. That is an error in the assessment of the first amendment, which applies to the government ONLY.
If you don’t like their product, stop using it. Encourage others to stop using it.
But don’t come onto a Conservative based web site and start screaming, “There ought a be a law.”
Build your own service, make it better, and put them out of business.