We can use objective metrics to tell if someone is a liar, a bigot, and a paid disinformant working for a foreign state.

... or we could have, 5-10 years ago. No matter what we call one of these people, no matter how true our findings are, if you accuse a bad person of a bad thing these days, they'll just accuse you of the same bad thing (no matter how little sense it makes) and they have so many stupid followers who will believe it, that being correct is no longer a winning strategy.