Nobody agreees on everything, news at 10.

There's still a plethora of things they do agree on and should be able to work towards a common goal concerning those things, even if the reasoning behind it differs. Turning each disagrement into an entire schism that fractures everything into smaller groups that will never reconcile is exactly what killed "the Left" in the end. You could even argue it's initiated and influeneced by outside forces. I don't personally think so, I think everybody has been steeped in that sort of landscape for so long that they've adopted the habits unintentionally.

Have your infighting, have your internal discourse and discord but don't forget the larger things at play that brought everybody together in the first place. There's decades of mess to fix and letting power slip through your fingers over this is retarded. It's a colossal task and it's something that has to be chipped away over time as we discover more rot in the process.

This is going to be a lifetime's worth of work, don't get preoccupied with the pebbles when we have boulders to remove.