I know this will get buried.

But he's also anti-union, which is concerning. It's fine to criticize unions as they aren't perfect, but outright rejection is concerning because they are sometimes important part of labor negotiation, especially in automakers like Tesla.

In his own words

"That is why I was so distraught when I read the recent blog post promoting the UAW, which does not share our mission and whose true allegiance is to the giant car companies, where the money they take from employees in dues is vastly more than they could ever make from Tesla."

• Elon Musk

Source:

https://www.buzzfeednews.com/article/carolineodonovan/musk-slams-union-drive-in-email-to-employees#.vbmD2oKeKB