This is so sad.
My very first suggestion is to put him on a leash and harness to control his behavior. It sounds as though you are trying to pick him up and he is biting. This is not an acceptable or safe situation. Personally, neutering is not going to fix his aggession but needs to be done none the less.
When you put the harness and leash on him you will be able to guide him into doing what you want him to do. I would also offer a small treat as you are doing this. You also need a trainer to further help with his issues.