Do I guarantee it? No ... but the recent fakish covid spike isn't strong enough to generate enough fear, so If I'm the dem operative scum and I know my early lead isn't enough, I need to stop people from coming out to vote or create so much chaos that I de-legitimize the vote.
If the dem's operatives (i.e the commie/anarchist mercenaries in Antifa, BLM etc.) who's job it is to win by any means or simply not lose by any means (nuke the contest itself so there can be no winner,) don't pull off some massive event to stop the red election day wave, then they will have failed at their fundamental mission.
“ I have a suspicion we’ll see day-before and morning-of violence at polling locations (i.e bombs) to drive down the election day vote.”
I agree completely with you. They will do all they can to disrupt the election. For they know after Trump wins it will be to late and their days will be numbered.