I'm not a fan of Musk, nor Trump. But the way Musk has gotten so many people's panties in a knot over his gesture, is truly remarkable. Personally, I'm not going to lose any sleep over it. It's not going to make the slightest difference to me, one way or another. But he's clearly living in so many people's heads ATM. The best thing you could do, is ignore him. 10 pages and counting...
The trolling is a big part of the point.
And it is a double-edged sword.
Ignore it and you're doing the tacit "Yeah, it's fine he is flashing a Nazi salute" thing.
Engage and you provoke all the "You're over-reacting" stuff which gets used to normalize doing a Nazi salute.
In the information environment we have, it's very tricky.
Which is why I say to acknowledge it, don't pretend it didn't happen, but focus somewhere other than "convincing them to admit it happened".