A quote from a fundamentalist textbook brochure at What do Christian fundamentalists have against set theory?
"Unlike the "modern math" theorists, who believe that mathematics is a creation of man and thus arbitrary and relative, A Beka Book teaches that the laws of mathematics are a creation of God and thus absolute....A Beka Book provides attractive, legible, and workable traditional mathematics texts that are not burdened with modern theories such as set theory." — ABeka.com
That's right, at least some fundamentalists disapprove of set theory on religious grounds.
Georg Cantor proved that there are multiple infinite sets. This disturbs certain fundamentalists, who feel that this is an affront to their beliefs. As one of them put it in the article I cited, "There is only one infinity, and that is God."
Fundamentalists believe that the Bible is literally true, that sincere adoption of the Gospel message is the key to virtue in this life and salvation in the next, and rejection of any part of it will lead to the fires of hell. Anything which contradicts their beliefs is inspired by Satan. Doubt is strongly discouraged.
Unfortunately for the fundamentalist viewpoint, the universe itself does not support it. The universe is far older than 10 thousand years; creatures, includimg humans, evolved from other creatures; there was not a world-wide flood; Joshua did not make the sun stand still and so on.
In order to accept the fundamentalist view, one must reject biology, astronomy, geology, much of physics, some significant parts of chemistry and even mathematics.
Another place you might go is
Conservapedia, the world's stupidest wiki. Andrew Schlafly, the man who founded and runs it, has a strange objection to things such as imaginary numbers (which is odd, considering that he boasts of his bachelors degree in electrical engineering), the equation e = mc**2, and the proof by contradiction.
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