Civil War is big talk, but even bigger action. And there are no real boundaries to abide by. The original civil war had the state secession drive it. The NE and W/SW isn't leaving, and it isn't as if the interior/South is leaving either. Violence in the post-election US isn't a certainty, even if Trump loses. Trump riles a lot of people and he only had a relatively small showing on January 6th. And many of them are in jail now. Committing to political violence is difficult. I would only think the threat real if Trump offered pre-emptive pardons before January 6th.
So are you saying we should just accept a Trump coup and ignore it? If not, what is the appropriate action?
Typically, this would be protest in DC thing. But there are a lot of steps that would need to be required for Trump to pull off a coup and plenty of opportunities to pressure Congress via protest not to do something illegal.
If we don't resist it, then we the Republicans will control everything permanently.
You are getting ahead of yourself here. Trump can't become President without Congress. And it would appear the Dems will control the House. That will make an electoral steal much much harder, potentially impossible. Let's put our energies within the current scope of issues.