I am a fully diagnosed DID system - I used to be anti-endo until a number of months ago when I had a startling realisation that made me reconsider everything:
Restricting the definition of who a label/concept can be applied to falls under the same philosophy that the systems that oppress the disabled fall under.
That is to say - restricting access so that imagined invaders and "appropriators" won't get in.
The endo "invaders" are not oppressors in any fashion. Hating them because our oppressors "won't take us seriously because of them" is joining the war on the side of the oppressors. It's only fighting ableism until the oppressors call out a target that's easy enough to punch down on.
We, as a community, can be better, more compassionate than that. Is this truly what being "radical" is? Stop punching down. For your own sake, too. Is this really the "good fight" you want to win? To remove all the "weirdos who don't belong?"
To my friends who still feel hurt, I understand. But the people you are fighting do not want to hurt you. They just want to understand their own individual human experience. If they are angry at us, they are not in the wrong. You know that rage, too, at being told that what you are is not real, or is impossible to take seriously.
You have been taught to value an idea of a "real" experience based in science. But that science is so limited. The DSM-5 is not a bible, it is written with the intent of treating us, making us more palatable, "worth our place in society". It is not something we should be thumping to ward off "impure" things. We do not need purity. We do not need sanctity. We need safety and community, so we need to build it.
If we view endos, willos, or any type of system as a pest, we will choke ourselves with pesticide to eradicate them. This is not kindness. This is not acceptance. It is cruelty.
Do not give in to the desire to punch down. It will kill you.