Not exonerating the lefty Republicans from their responsibility. My recent reading of early 1900 US history shows globalism belonged in both parties. The average citizen did not want to be entangled in international issues even then. WWI and WW2 greatly advanced US globalism. That being said, the decay and fleeing of inner cities and empty store fronts started to occur well before the 1980s commercial globalism acceleration, and it wasn’t the average GOP politician running those places.
Republicans offshored our means of production to other countries including a Communist enemy. This condemned many a small town to economic death and sent many into the opportunistic arms of socialist rats. That wasn’t Democrats that did that.
Guess what...... what you worry about as globalism is actually just change