Elon Musk lashed out at George Soros after the billionaire liquidated his stake in Tesla, smearing the 92-year-old in a personal attack. Fresh from picking a new CEO for his financially troubled Twitter acquisition, the entrepreneur compared the Hungarian-born Holocaust survivor to the nemesis of Marvel’s popular band of mutant protagonists. “Soros reminds me of Magneto,” he wrote on Monday, claiming the philanthropist uses his considerable wealth to the detriment of mankind. The world’s second-wealthiest businessman did not explain what prompted his attack on Soros, but a quarterly SEC filing last week revealed that the investor dumped his entire $16...