Do we want a world where people continue to "walk on by" in case the press dig up their past? People are complex. They do wrong things, and good things.
Surely, the fact that he has been convicted of domestic violence, but moved to help the victim, when he thought the matter was a comparatively simple domestic violence case, is personal progress to be applauded?
Many previous perpetrators of domestic violence would always be on the side of another perpetrator, wouldn't they?
For all we know, he went to help, because he sincerely regrets his previous behaviour.
Or maybe he's still hell to live with. It doesn't matter. Because he's someone who did what was right one random day, not a politician running for office!