"violent" is used many times in this announcement, but it would seem that one of the most violent entity in the world right now are the US? Also, it's so weird that "antifa" (antifascists) has become a bad thing. If antifa is bad then it must mean "fa" is good? So we should bring back the Nazis?

The "Western hemisphere" (which, of course, is neither) tolerates the US and the way it enforces its decisions outside its own borders, because it used to provide some assurance of stability and protection. But as the US rescinds that policy, weakens Nato, declares a tariffs war to every country on earth, etc., there will be less and less justification as well as, probably (hopefully) less and less public acceptance for any of this posturing.

> one of the most violent entity in the world right now are the US?

always has been

e.g., https://www.youtube.com/watch?v=SG0Ql0VfcRg

I too find it really weird. My grandpa was a member of a violent antifascist organization (US Army, 1940s). The US government even awarded him multiple medals for his antifa activities.