Yeah I called Sanders a nutjob because he had no clue what he was talking about. The prime ministers of Nordic countries called him out a few times for mislabling their countries as socialist.
Most of the western world relies on the US as a strong partner with a shared moral framework. Not a proto-fascist regime that has more sympathies for other dictators and their war efforts that international cooperation.
by American system, I meant the fiscal/ political system that enables US to generate enough wealth to have a big military that has sustained Europe post WW2+ not to forget the The Marshall Plan.
And when the US populous elects a government that comes with a whole fascist playbook and statements to tell people they mean it, that will make the world uneasy.
The reason current US politics are so badly received in large parts of the world is that the US make sure that nothing happens in the world without their meddling. We're all affected by what happens in the US.