You really ought to review history. Historically speaking, those countries that tried the isolationism that you suggest fell far behind other countries in the world, and they eventually had to embrace what they formerly eschewed.Trust me the conservative do not not like this globalism either its the left, aka, elites, aka establishment that are pushing for this. We understand what's happening but they simply have too much control.
And you really think things would change if the US isolated itself? Yes, they probably would, and my bet is that things would get far worse than they are.