[mabub24]

I suspect it has much to do with the idea that trans-men are transitioning into a gender "in power." That is, adopting masculine social behavior and lifestyle allow transmen to enter the patriarchal fold and slip quite seamlessly into a male dominant society, as long as they remain unknown. Once they are known, the idea that they must be excommunicated or "proven" as female becomes imperative. Transmen are subject to inordinate degrees of violence like transwomen. This is all to say that cis men aren't as afraid, be it in washrooms or on a sports field, of transmen as much as transwomen.

Transwomen, on the other hand, are much more defined, in the eyes of a patriarchal society, by their rejection of masculinity in favor of femininity. To some cis-men, they appear as aberrations or duplicitous (hence the nickname "trap"), to some cis-women they appear as potential unfalsifiable unknowns, and a potential thing to be feared for sexual violence. Transwomen are thus caught in the crossfires of fear from both genders.

[secondcoming]

I don't think so, that's a work of fantasy and quite the leap.

It's probably more that in the grand scheme of things trans-men don't pose any sort of threat to other males. I don't recall ever discussing trans-men with my peers.

[klipt]

I think it stems from privilege.

Trans women are seen as seeking female privileges (like the ability to compete against women in sports, which is easier than competing against men). Which enrages some people.

Trans men are seen as giving up their female privileges, to which everyone shrugs and says "you want less privilege? Fine by me!"

[chillwaves]

Are there no privileges afforded to men?

I can think of at least one -- working in tech.

[klipt]

I've met quite a few trans women working in tech!

Of course men have privileges too, but I think many of men's privileges come from confounding variables. Like men are on average taller, and people are biased to view taller people as having more authority, so taller people are more likely to become CEOs etc.

Whereas women's privileges come from society compensating for men's privileges. So society sees women on average are smaller and physically weaker, and thus decides they need privileges like separate sports to compensate.

Trans women who went through male puberty often have the size advantage of men, so them also have the social privileges of women is seen as double dipping.

While for trans men it's the opposite, they're often small like women, but not afforded social protection for it.

Anyway that's just my theory why some people hate trans women more than trans men. I myself have sympathy for both cases, dysphoria sounds pretty awful.