Ok found an article on who is bothered by the existance of transpeople

On a brief scan of the reseach, its seems that its mostly cis males who percieve transpeople as a threat to thier masculinity. No surprise really but kinda snowflakey. People who are secure in thier gender identity dont GAF *laughs*

https://www.psychologytoday.com/us/blog/inclusive-insight/201809/what-precisely-do-transgender-people-threaten