I think you got it exactly right and that attitude is what allows single issue voters to exist.

The thing that’s annoying to me is that they immediately deflect to Clinton and Biden, but not because they’re genuinely interested in prosecuting actual crimes. Their interest is truly partisan, while masquerading as caring about fairness. That’s also why they have to pretend that what Clinton did was worse than what Trump did - if they equate them, that still leaves it open to prosecute Trump since they’re so gung-ho on prosecuting her.