Let’s say I own a bullhorn shop. In fact, I have purchased every bullhorn shop, distributor, and manufacturer of relevance in the world.
Someone, a self proclaimed Nazi, comes to me, the owner of every bullhorn, to buy a bullhorn in order to convince others to be Nazis. I, a Jew, refuse to sell the bullhorn to the Nazi.
Am I being overly simplistic? Probably, but I don’t see where my analogy fails. I fail so see the strength in the “Facebook controlling the content of the platform it owns destroys our constitutional rights” argument.