I mean this interaction has sort of changed my mind on it too; if a leftist wouldn't assume it's making fun of fascist talking points like that or referencing the black book of communism's attempts at math then it truly isn't that good of a point to bring up with libs. Reminds me a lot of seeing a lot of literal nazis bashing Jewish people in pro-Palestinian twitter posts and how easy it is for neolibs to imply they are both the same groups.