If I were to speculate I would say it goes something like this....

Musk knows what is what, and how the show is being run. He got his hand slapped and will tone it down. He knows though, that what we are witnessing is the beginning of the human civil war - that TPTB are willing to go to war(because it isn't them that will be fighting it) to make the New America and that Trump is willing to do the same to bring back the Traditional America. That conflict could potentially end life not just for the country or even continent - but our species itself.

Musk is looking for the path with the least death and destruction(IMO), and probably thinks that if Trump walks away the war can be pushed off or defused and that buys us some time. I disagree, but if that is the reasoning I can understand it.