[faeriechangling]

Well regarding the specific person I cited they identify as "radical left" in their FAQ and they're probably the most prominent activist I can think of that makes this sort of advocacy.

https://www.autistichoya.com/p/blog-page_19.html?m=1

I don't mean to say all people who day people should stim openly are exactly far left. It's pretty mainstream especially in health/education nowadays to not suppress stimming so long as it's not unduly disruptive or harmful (i.e. stimming by screaming, smashing head into wall), as it's thought to be harmful for the suppressor.

I would say that if somebody is stimming as a political statement or identity I'm almost invariably going to assume they're pretty left of center, because they're making an identity out of nonconformism and because of blog posts from radical leftists like the above.