Well, if he did it and there was no opposition, it certainly makes it "valid". Where exactly has it been made invalid? Has anyone done anything to make it invalid? Aren't they free, and can they do it again?
And the slush fund for the Jan 6 rioters is just suspended, not canceled. It will come back.
Just because something happened doesn’t make it “valid”: it’s not moral, and your side doing it may not have the same effect (good people can’t use evil tools as effectively as evil people).
I don’t really care whether Jan 6 rioters are free, they’ve spent months-to-years in jail anyways. What’s important is preventing future crimes, which punishing deserved people broadly on your side helps.
> Can they do it again
In 2028 if a Dem wins? At best they’re looking at another few years. (Trump won’t successfully pardon a crime as egregious as this (before anyone serves time) unless the Dem is really ineffective, because of how similarly it can be used against his side.)