You're right, he breaks my heart with his expressions. I may not be a dog person, but I can't stand the idea of any animal being abused. He deserves everything you all do for him, and I am so sure that he is seriously grateful. You can see it on his face. I would definitely take him in before I'd stand still for anyone mistreating him.
Despite his "tripped out" behaviors, we'd just have to work through it until I found him a great home....nothing that you will ever have to do battle with. I'm sure he's doing the best that he can.
Why is it that dogs can be mans' best friend, but man can be dogs' worst enemy? I just don't get it.