Unfortunately, "most people's definition" does not factor in at all when Elon is claiming to only be upholding the law. It is my understanding that "doxxing" is not only largely legal in the U.S., it is in fact common practice for various administrative databases to be published unredacted by default.

Whether the law adequately protects people's privacy is a different conversation (worth having in my opinion!), and so is whether or not public or private non-government entities should step up instead and provide that additional protection.

With steps like this, he just clearly shows that he either never was all that serious about that claim, or that he has quickly learned why content moderation isn't as easy as "upholding the law and nothing but the law", especially in the U.S.