Self-described free speech absolutist Elon Musk couldn’t resist warmly welcoming Kanye West back to Twitter after the rapper had his Instagram account locked over the weekend for posting a caption that echoed dangerous Nazi propaganda by suggesting that Jewish people today have too much power. On Saturday, Musk replied to a tweet from West criticizing Mark Zuckerberg for the rapper’s Instagram ban, with Musk saying to Kanye, "Welcome back to Twitter, my friend!" A short time later, West got his account locked on Twitter, too, this time for escalating his antisemitic content. In another tweet, West coldly invoked memories of...