Relevance?

I believe they’re calling into question the standards that Republican supporters hold politicians to. If these statements by Biden are deplorable than why aren’t similar statements by Republican politicians treated the same way? They’re not saying Trump says bad things too, which would be irrelevant, they’re saying Trump said similar things, so shouldn’t those things be bad?

If one argues a politician must always pronounce someone’s name right, shouldn’t one dislike Trump making up names for everyone?