I feel like it's been memory holed, but I remember 00's flat earth being genuinely smart people using it to illustrate the ridiculousness of teaching creation beside evolution, which was a push around that time. It was a Church of Satan style mockery, but I guess the arguments were too convincing.
I member... i learned of it from a vsauce video i watched when it first dropped. Was mindblown years later when ppl were touting the flat earth society seriously. Their tagline was literally, "We Have Members Around the Globe!"
Without a winking smiley or other blatant display of humor, it is utterly impossible to parody a Creationist in such a way that someone won't mistake for the genuine article.
This is what happened at the Donald on reddit. It was a place to meme Trump's idiotic presidential bid. But as soon as he got real chance at the election it was soon overran by the MAGA crowd.
I need to become an author, create a Cthulu religion, buy lots of boats, and an island with a giant Cthulu statue with no explanation to keep it a mystery. I'll build a church and instruct everyone to stay away from the island. Inside the statue I'll pay a person to sell merchandise...
I recall it being an argument in a high school debate club or someother which made it's way onto 4chan and found supporters, who then proceeded to do what 4chan does best, and troll people/targets of their derision. Basically they assumed no one was stupid enough to believe it and were shockingly surprised.