So, Ive heard from 2 different rescues now. One has told me to put him down.
GSD Rescue of Central Texas
"Sometimes we do if we have room, but cannot take aggressive dogs. So sorry. Fear aggression is the worst kind, its so unpredictable. It would be better for you to put him down if you can't work with him or afford to work with a behaviorist on his issues. Shelters will put him down and he would be scared there and miserable before he dies. "
The other one, I had to do an App for. And wait.