> Since when was autism a cornerstone in anybody's ideology?

Anti-vaxxers?

This isn't really political. Both the left and the right fall into this camp.

Just because it doesn’t neatly fit the normal left/right axis doesn’t make it non-political.

“Autism-identity” could be considered an idiological movement.

"Men have different distribution of extremes, more dumbasses but also more brilliance, eg. autistic savants, which explains more CEOs and Nobel Prize winners, and therefore systemic sexism is a myth to deny biologically determined outcomes."

it's a very important shibboleth for modern sexists

Why would it be important to a sexist? There's nothing about the hypothesis that lends itself to predicting the performance of any individual on the basis of sex. Indeed, it explicitly predicts equality on average. It only threatens the sexist position and supports the egalitarian position (it seems likely that people who are threatened by this hypothesis are actually sexists masquerading as egalitarians).

Meaning what?

It would mean that it's unlikely that differences at the top (and bottom, but we mustn't talk about those) are attributable to discrimination.