They were never evil. It's like calling a normal wolf evil for killing deer! It's not logical!
well since hicrine is lord of the hunt "the sport of deadra" and lycanthropy was created by him.
you can't really compare it with merely hunting for food.
is a wolf evil for killing a deer and then eating it? no
is the fox evil for killing an entire coop of chicken without eating any of them? yup
is the komodo dragon evil for killing some1 merely because they look him in they eye? yup
this is ofcourse by human standards, in the eyes of deadra, its just all fun and games