It's a hard one. I can tell you something which doesn't work because the Americans have tried it twice so far. It won't work to say "Well, that was naughty, please don't do it again".

That silliness is how you get Jim Crow, it's how you got Trump 2.0

In a civilized country I can believe jail time would be good enough, but the US still uses capital punishment, so seems to me that if you want to be taken seriously some of those responsible have to be executed

In practice I remain doubtful that such an orderly transfer is likely. If there's chaos, for even a few days, that's how you get France's "Wild Purge" in the period when German withdrawal and Allied liberation are happening one town at a time. The accused are punished, sometimes even executed, without anything resembling due process.