But it's not because they think an election was stolen, it's exactly because they do know after all that is wasn't. The US actually does need a new Constitutional convention because the existing setup one has produced a government that has become strongly unbalanced in an anti-democratic direction - but it's to the advantage of the Reds. So for them reform toward more democracy is a losing proposition and they know it. That's why the specter of Strong Man/Fascist government doesn't move them to fear, they know if that figure comes in the name of protecting their prerogatives they will not be worse off than if the proper voting power were actually to flow the majority of people, who don't share their politics, and they lose their position of minority control or at least outsized minority leverage.
It's actually rational behavior not based on a false premise but the real situation. The false premise is just the cover - a way to justify refusing to keep playing the democracy game if it means they will be the ones losing elections.