Funny thing about the fictional "Wilhoit’s Law". It's not a law of science. It's nothing but an Internet snipe from a blog post by a music composer. It wasn't even written while the political scientist Frank Wilhoit was alive.
It's not relevant that the quote came from a composer specifically. It's relevant that it didn't come from someone with any expertise about politics. Yet it's been elevated to the status of a "law" by people who just really like the way it insults their opponents.
https://slate.com/business/2022/06/wilhoits-law-conservative...
It's just half of a truism: people apply different standards to "their side". As true of the left wing as the right.