Ebay should be forced to allow buyers and sellers to trade anything that is not illegal. They should not be forced to promote items they do not want to promote, but they should not have the final say on whether I can sell or buy an item on their platform.

Why should they not have the final say? It’s their platform. By the way, in eBay’s seller terms & condx, I guarantee there’s a clause where sellers give up any recourse if eBay decides for any reason to delist your items.