Trump probably couldn’t bottle up the hideous forces he’s helped unleash even if he wanted to, and there’s little sign he wants to. If the president never did or said another racist thing, said [Daryl Johnson, a former senior terrorism analyst at the Department of Homeland Security], “it’s still going to take years for the momentum of these movements to slow and to die down.” As it is, Trump’s grudging anti-racism is unlikely to last the week. The memory of the mayhem he’s inspired should last longer.