Keep it free from hate without controlling it? Who gets the ultimate say, then? The internet or the government? If your answer is "the government" how in the world does that work without controlling the internet? What government has successfully done this before?

"Let it be free, but control it to keep this part out."

That's literally what you're experiencing. You get to witness the flaw in the part where you don't get to pick the entity that decides which content doesn't belong.