Twice I conducted a study: I collected everything on their op-ed page over a week or two and coded them for their political stance. I think there were a couple pro-Democratic/liberal pieces out of over a hundred, and a few criticized the Republicans;[0] all the rest were pro-GOP/conservative or anti-liberal/Dem (plus a few that were apolitical). (And if you think the NY Times is the same, you're wrong: Ross Douthat, Bret Stephens (former WSJ editorial page editor) and David Brooks are all conservatives, and maybe others are too.) I encourage anyone to do the same; I feel I can almost guarantee results ever over a small sample like a day.

My conclusion: WSJ op-eds and editorials are partisan mouthpieces for the Republican Party and conservatives. I don't know how Tesla fits into that, but that's their motive. Denying climate change and demonizing any attempt at a solution? Supporting big oil? Musk pulling away from Trump? Others might have a better guess than I do.

[0] Criticizing Republicans is not necessarily pro-Democratic. For example, an editorial could criticize the Republicans for not cutting taxes enough.