Note that these people often condescendingly refer to themselves as "rationalists," as if they've unlocked some higher level of intellectual enlightenment which the rest of us are incapable of achieving.

In reality, they're simply lay people who synthesize a lot of garbage they find on the Internet into overly verbose pseudo-intellectual blog posts filled with both the factual inaccuracies of their source material and new factual inaccuracies that they invent from whole cloth.