This is confusing. If I accept your statement, then it seems:
1) The democrats hypocritically supports offshoring while claiming to support workers
2) The republicans explicitly (prior to Trump, but MAGA is not very similar to traditional Republicans) support corporations and offshoring as a mechanism for increased profits
No they aren't exclusively to blame. But they were a big part of elimination of manufacturing jobs in the 90s, and were huge critics of attempts to bring them back. I don't want people thinking that the left are some kind of "underdog" that is championing the people. Also their fiscal policy doesn't depend on manufacturing jobs. They can just print more cash and hand it out in various "programs". They, as a party, profit off suffering of Americans because they are always there to sell their voters a solution. The worst thing that could happen for them is people doing well. Because they won't be needed anymore.
1) The democrats hypocritically supports offshoring while claiming to support workers
2) The republicans explicitly (prior to Trump, but MAGA is not very similar to traditional Republicans) support corporations and offshoring as a mechanism for increased profits
And so we blame "the left"?