Musk has been promoting extreme right-wing opinions, conspiracies and outright lies for quite a while now and he's obviously seeing the Trump presidency as a key success in his plot for world domination, so he no longer needs to hide his fascism/racism etc.
Why other organisations are seeking to downplay actual Nazi salutes must be because they are scared of the power imbalance and seek to appease (hint: that never works).
Once you start differentiating between Zionist interests and Jewish interests, the last 80 years (and especially the last 15 months) makes a lot more sense.