I'd say that that's more a reflection of the overall political alignment of that community you've seen rather than anything else.
Just as how reddit swings left, and thus comes with massive aoc/whatever figure the right likes to hate support, that community on Facebook swung right and thus has a higher rate of "left hates this guy" Support.
AoC was selected as the example due to her "dunking on the right" reddit popularity thats analogous to the "destroyed with facts and logic" Shapiro crowd.
That twitter account captures "the sources of the 10 top-performing link posts by U.S. Facebook pages every day, ranked by total interactions.", it's not just some part of Facebook. This is Facebook.
Yeah, it is. I did check that twitter feed afterward. I didn't edit as it doesn't really affect the point I was making. People just love dunking on their enemies.