It's so sweet of Neville's grandma to send him to Hogwarts! Just because SOME DEs tortured your son and daughter-in-law doesn't mean others won't make fine instructors for your grandson!

HAHAHA Well, as we know her, if he said "I want to go to school and fight" she would have probably answered "Yay! I always knew you were not a waste of space deep down - Now I'm finally reasonably sure!"