Please point me to anywhere that it is treated as a single thing that isn't the people using Autism to push an anti-science agenda.

It is an Umbrella term that is well understood to be a "spectrum" and well understood to not be the same for 2 different people.

My question though, what is the point of separating it. What do we actually gain from doing so? I guarantee you these attacks will still exist.

I don't have a degree in this but I have to imagine there was a good reason that Aspergers is no longer its own diagnosis.