What all of these rather different cases have in common is that none of the people who were deprived of a livelihood in the name of fighting racism appear to have been guilty of actually perpetuating racism.

Anti-Racism of the left is like their Anti-Fascism. E.G. like the rest of politicians, they do the opposite of what they say; if they were successfully fighting their cause, they'd have to disband.

If a lot of Americans come to feel that those who supposedly oppose racism are willing to punish the innocent to look good in the public’s eyes, they could well grow cynical about the enterprise as a whole.

A little late for that, dear. The entirety of the right realize that "racist" means "I didn't pull the straight democrat ticket lever".