In general, I have found that there is a large cadre of able-bodied accessibility professionals who are hostile to accessibility professionals with disabilities

That... makes no sense. I'm trying to figure out ways that it would make sense, but it just doesn't - well, not beyond the personal level of persons A and B just plain being hostile to each other, and that wouldn't cover a large cadre.

I'm not doubting you, mind. I just can't seem to go beyond "Bwuh? But WHY?"