It’s perfectly possible having been born with characteristics that make one a “member” of a minority and still be a prejudiced asshole who discriminates against “others”. In fact the prejudiced take is to expect that’s any less likely for people from a specific minority to be prejudiced than other people.
That said, Trump and his ilk are targeting with their hate LGBT+, though mainly Transexuals and LGBT+ isn’t really A community but several.
Considering that at least some year ago there were plenty of stories of Bisexual men being discriminated against by other LGBT+ people, it’s not overly surprising the notion that some people who are Gay would thing that attacks on Transexuality are nothing to do with them personally and might even agree with it.
Unlike the reductio ad absurdum fantasy of liberal Identity Politics, people do come in all kinds no mater what group you tag them as being members of.