The article is an absurdly over the top straw-man and its target audience falls for it because they don't know that.

I could make an equally broad claim that Mormons believe absurd things. And when someone says I misunderstand Mormonism, I could claim that's just an appeal to ignorance.

People who don't believe in religious or cultural tolerance frequently float this conspicuously straw-man representation of those who believe in wider cultural tolerance. Typically using the ill-defined term "post modern". It's usually the same group that distrusts higher education and social criticism so a chance to attack them in an obfuscated way like this is doubly attractive.