Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.

1. Abusers lie
2. Even if it's true, it says nothing about emotional abuse. Is the physical damage he's done to you the worst thing he's ever done? I know for certain that the worst my ex did to me wasn't physical.
3. Again, even if it's true, it just shows he's getting worse. Maybe he'll say one day "I never killed any of my previous girlfriends".
Quite apart from any of that, nobody but NOBODY deserves abuse. It doesn't matter what he did or didn't do to his previous girlfriends - what matters is he abused YOU.