I almost lost a good friend to drunk driving, and of course I was angry when I heard it was a drunk driving accident. But I can never in my life imagine saying I will show no simpathy because it was his mistake. People all do foolish things at one point or another in their life and no one is perfect.
What if someone was driving late at night, very tired and they sat a red light. For some reason they think the light changed and they pull out and get hit. Would we say no simpathy because it was their fault for pulling out? No, we wouldn't.
I really hope your friend pulls through. My heart goes out to him and you.