It is not unusual for a PWD to have prejudices against another PWD. As
Bob said it may be jealousy or more likely they see in others what they do
not want to see in themselves. Or could be they are just plain ornery! Among
profession there is a known pecking order of influence, beginning with folks
in wheelchairs and those with sensory impairments at the top down to those
with mental impairment at the bottom. Below that are self-inflicted
disabilities such as alcoholism.
Bobby