Literally impossible because most people will sell out. You build your own free speech platform - it gains traction, jews offer to buy you out for some absurd sum, which you'll probably take. They can't risk having large mainstream platforms that aren't under their control. Look how platforms like X or Facebook are able to control narratives...
And even if you don't sell out, the very users you set out to protect are going to start calling you a jew sooner or later.
And even if you don't sell out, the very users you set out to protect are going to start calling you a jew sooner or later.