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.

That's not refuting my claim. It's turning the claim into an ad-hominem by attacking my character. You can research who donates to Democratic candidates if you want to see evidence of my claim.