Two things about this "enemy of the Potters" curse.
1) There is no portrait of Dumbledore. That hasn't happened yet. He won't die for who knows how long, and apparently in the new timeline he hasn't done anything bad enough to the Potters bad enough to qualify for the spell, so he'll never have it on him in the future, either.
2) So stealing from war-orphans is worse than failing to save a family.

Also, of course Peter doesn't qualify for the "Code of Harry."