The bombs will start a few weeks after Trump is reelected, when the Antifa/SDS morphs into the Weathermen.
I don’t think that it will take that long - I think that it is already planned to start massive violence on election night as exit polls and results start coming out that show Trump winning. Frankly, even if he loses they’ll riot - just like many hometowns of NBA Championship teams get trashed and burned out when they win. These people - both the ones pulling the strings and the street-level thugs - think that this is their time. I don’t see either of them having the patience to wait.
But once the flare gets fired, it won’t go exactly like they think it will - as Mike Tyson said, “Everyone’s got a plan until they get punched in the mouth” - and there are definitely going to be a few punches that will land.