A populist movement that attracts enthusiastic support from billionaires probably isn’t much of a populist movement. Tesla CEO Elon Musk once again reminded everyone why it’s important not to trust a billionaire populist . This week Musk , who loves to post nonsense on Twitter , embraced the weeks-long Canadian trucker antivaccination protest with his usual clumsy belligerence. He tweeted an image of Adolf Hitler that said, “Stop comparing me to Justin Trudeau. I had a budget.” After heavy criticism, Musk deleted the tweet with no explanation or apology. After heavy criticism, Musk deleted the tweet with no explanation or...