German media has been extremely coy calling Elon out about it. You would think that they'd be all over this, but them phrasing it as questions and digging out the "roman salute" (that no one here has heard of before) has been an eye-opening experience.
It's an opinion piece, and exceptions confirm the rule. Just search for German news articles on Google.de. See how many legit news outlets mention "Musk Hitlergruß" and how many more opt to beat around the bush when you search for "Musk Geste".
