If your partner bullied others in the past would you still stay or break up?

Scenario:

You've been together for 6 months or more, everything is going great but you find out they used to bullied others during their junior and HS school years. They didn't want to share this shameful information about themselves. Would you still be with them if they changed their ways since? Or would you immediately break-up?

I would stay if they've changed for the better.
Breaking-up... once a bully always a bully
Other
Select gender and age to cast your vote:
If your partner bullied others in the past would you still stay or break up?
Post Opinion