Have "discussed" (okay, argued) with a buddy over the last few years about the core difference between the Dems and Reps (not policies etc, more character-wise). I have argued that, given the opportunity, the Dems are just as capable as the other to "look the other way" when convenient to them and their cause. He is way more optimistic about the Dems than I.
I have not watched the news, especially American, since Trump won the election, so have not kept up with recent developments. However, if ALL the Dems do not vociferously and publicly pillory (?) Biden over this pardon, then they can never assert the high ground on any topic.