I don’t know if they are crazy enough to start WWIII.

The US alone has repeatedly tried to start World War III. It's the restraint of other countries and sheer dumb luck that has prevented it.

Look at the US poking Russia for over a decade about red-line issues on their border. They barely give a shit that it's a nuclear power and they'll use any excuse to declare that there was an attack on a NATO country to ramp up the pressure even more. US ghouls don't know how to stop or deescalate, they only know how to argue about different ways to destroy their enemies no matter what.

Things are going to get very bad once the US is actually backed into a corner. It acts completely recklessly when it's under very little threat.