American white supremacy and the anti-communist stance energize the far right and liberal fascists. The US is imploding, and Americans kill each other for sport.
The world doesn't have to do anything because the US is killing itself - after murdering millions, unfortunately.
There's no point in arguing with people who have endured a lifetime of propaganda. They have to see it for themselves to believe it, and even then, they may ignore the truth.
Imagine Americans enduring sanctions, foreign political and military interventions, and coups that back a military dictatorship.
The US would blow up the world before losing, and that's our greatest concern because it's losing. It's so fearful and weak, it's shooting every goddamn thing out of the sky. Hopefully, someone sane talks sense into the neocons, but I don't know if sanity exists in the US.