It’s always trivial to perform a 51% attack by forming a large mining pool. You don’t have to kick people out of China to do that. The only issue is convincing

It’s always trivial to perform a 51% attack by forming a large mining pool. You don’t have to kick people out of China to do that. The only issue is convincing the miners to go against their economic interest. China could have relatively easily done that previously but now it will probably be difficult for any one country to become that non-economic actor with both control of hash rate and the ability to coerce miners.