Be good if there was lots of peaceful, civil disobedience and non-violent resistance.
This weekend's marches were a good start. The riots in LA were not helpful.
I think that peaceful civil disobedience is effectively impossible in the US (and for that matter the UK) because the police will go in with tear gas and batons to disperse the protesters at which point it's no longer a peaceful protest.
A peaceful protest requires the cooperation of all parties and that won't be forthcoming for a "left wing" protest.