Giving you the benefit of the doubt, I presume you mean that it was an exercise in preaching to the choir.
But the way you put it seems to denigrate the white liberals themselves. Are you actively scorning valuable supporters?
Prior to the protests, there was a lot of discussion about how people of color, and especially black Americans, were always the ones putting their neck on the line for progress in this country and that they felt particularly vulnerable and that it was time for white people to stand up. I heard that line repeatedly. So why are we criticizing them for standing up when we told them to stand up?
How about you try to be inclusive and encourage as many people to join your cause as possible?!