Someone calling you a eugenicist is not a "cancellation." Moreover, Weinstein was not fired, and has an arguably more distinguished career now than before.
They slandered him unfairly, then prevented him from responding unless he met their demands of sending cash via Venmo for some supposed slight against black creators.
They did this in a semi-public forum without any concern for him or his reputation. They did it with zero fear of repercussions because they are emboldened by the fact that our current society makes certain people completely beyond reproach due to the color of their skin (or other identity characteristics).
It was wrong, and the fact that people won't call it out when they certainly would if the variables were changed, is exactly why these "dumb people" will continue to do it. Stop giving them a free pass.