One of the tactics of communists is to destabilize a country by ripping out all the foundations of the society. History, morality, traditions all must be marginialized and eliminated as much as possible.
Here comes flat earth, to contribute to that. They love to come up with scientific-sounding explanations why the earth is a flat disk, and ignore basic physics. They toss around a lot of complex sounding explanations while ignoring observable facts and invent their own science. It's all done in an effort to destabilize the country, just like all the sexual madness that's being pushed.
And how nice is it that conspiracies.win doesn't ban these people, nor should they. Although ad hominem attacks show a lot about the level of discourse (both sides do it, but one more so than the other possibly due to strong indoctrination), it can help people to better handle these conversations in the future. Can't bash gaw and expect the same results.