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.
Because he has been indoctrinated and propagandized into it without realizing it. If he actually examined the opinion of a ‘flat earthier’ with an open mind, he would at least understand why they feel that way and not just call them retarded. There is more evidence the earth is flat than round. That is indisputable, at least, in my opinion based on experiments and research I have done. Reading a story in a ‘text book’ that was written by the people the seek to enslave us and taking it to heart like it’s obviously the truth is ill-advised.