It's not doxxing when people publish things under their own names. Even so, doxxing is of course perfectly legal in the sense of uncovering the name of a debater. Not so in publishing the adress or other irrelevant information.
And I hope you understand that there is an enormous difference in person A purchasing a popular car and person B publicly celebrating a gruesome murder.
To me the important thing is the "nefarious" action that is "implied". For B it's firing (I understand that's what's been happening in this case) and for A it's vandalism (as that's what was happening at this time).
And getting fired for expressing a 1A-protected opinion outside of work hours, and getting your car destroyed for purchasing a legal product are pretty comparable.
If you are publishing things on the Internet under your own name and your own face, it is expected that the world should know. You were yourself the person who shouted it out to the world.
If you purchase a vehicle, it is not expected that the world should know. Purchasing a vehicle isn't public speech.
In none of the above cases should the person be physically mapped or stalked. Or be the victims of terrorist attacks.
And I hope you understand that there is an enormous difference in person A purchasing a popular car and person B publicly celebrating a gruesome murder.