Don't make me laugh. "Alt-right" is a stupid, nonsensical term made up by news corporations to serve as a convenient boogeyman, and the meme itself isn't sexist in the slightest. Elevated estrogen levels in men ARE detrimental for numerous reasons. This has nothing to do with women, period.
Soy is associated with elevated estrogen levels because of phytoestrogens. Whether or not they actually affect the human endocrine system isn't clear, but you can't deny the customers of Soylent products all share... similar traits.
???
> In this imagined causality, someone who consumes soy milk would be more feminine, and of course women are bad programmers.
You're looking too deep into this. It is you who is implying that.
Full disclosure I’m 100% northern European ancestry, 42.75% English, 37.5% Irish, 6.25% Danish. Plenty of hard working developers with similar ancestry to me, neither the less, the stereotype would be Asian developers are harder working, certainly the bosses often think that, to the point that I’ve observed what I would categorize as pro Asian biases.
Anyway, I’m guessing soy latte ordering is likely positively correlated to developer performance. Not negatively as you suggest.