The US needs to worry about threats from Russia, China, insurrectionists, white supremacists, Antifa, rioters, looters and all sorts of stuff.
None of that means that the goals of the WEF are all in America's best interest, or that they don't warrant any concern. I'm not sure why you are arguing that several wealthy individuals and world leaders don't have actual power when acting in concert, when we see individuals manipulate governments, board rooms and markets all of the time. And while I applaud some of their environmental goals, there is a hell of a lot more to WEF that that.