Even before we knew the targeted killing of UnitedHealthcare CEO Brian Thompson by Luigi Mangione was politically motivated, many leftists were justifying, celebrating, and rationalizing the shooting. There’s a real debate going on in some quarters of the progressive Left over whether slaying CEOs is a bad thing. And it’s unsurprising. Of course, if any MAGA professors or journalists were online publicly defending the killing of perceived political enemies, there would be thousands of wringing hands lamenting the menacing rhetoric of conservatism. And rightly so. But the unhinged demonization of the health care insurance industry, the pharmaceutical industry, and Big...