I understand what you mean, and I'd agree that its presence in the acronym might be apt, but I think I take issue mostly with the characterisation of it as a toxic ideology by the post title.

The self-described "rationalist community" I'd certainly agree is mostly toxic, as is the "skeptic community". Unfortunately, they both came to be defined by the worst people in them. (The doomsday cultists and the bigots, respectively, mostly.) But I don't think that makes rationalism and skepticism toxic ideologies, just as I don't think the existence of TERFs and "girl boss feminists" makes feminism a toxic ideology.