For that to be true, they'd need to have observed a large contingent of leftists arguing that it'd be better for people to vote third party instead of for Biden. But what they've been seeing are tankies, who aren't leftists. You're mixing the word with the concept.

If I look at 🌸 and think "bird" and say "I love when birds fall from trees" I'm not saying that a 🐦 falling down dead is a thing that brings me joy.

But then again, maybe I shouldn't expect you to understand, since you lot have trouble figuring out the difference between a word and the thing the word means. It's a standard error of definitions.

Edit: to further the point, even if we consider the set we call "Leftists" to include what I call "tankies" there's nothing wrong with the meme, because they's criticizing a particular group doing a particular thing and I agree with the criticism. It doesn't matter what words they uses because I agree with the base concepts they's trying to convey. And that's the part that matters. Fuck your word games.