As far as I know, “defunding the police” wasn’t a campaign promise, let alone a “core” one. It indeed was the opinion he had in the past (and you can argue about whether he still thinks that privately), but there are also many statements from the last several months that he’s explicitly _not_ running on that.
What a weird take. Isn't it better that he says it before the election? I think you just have it out for him, and no matter what he does you will find a way it's wrong.