FYI, Voter Action (now defunct) proved in a court of law that Kerry won New Mexico.

Among many other problems, their touchscreen voting machines didn't count spanish language ballots.

Part of the settlement was NM had to junk all their new machines and go back to opscans.

Given the circumstantial evidence and coverups, it's entirely reasonable to assume that election integrity problems were widespread. But we'll never know, because the evidence was destroyed, often illegally (eg despite federal injunctions).

As for why non-Republicans don't talk about this: Because it's a trap. Priming the public with the idea makes it easier for someone else to come along and seize the initiative, despite any reality. And few non-Republicans know how to wield the bully pulpit.