Time for a national conversation about left-wing violence

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...