"Black Lives Matter" is more popular than either President Trump or Joe Biden, the presumptive Democratic nominee, according to recent polling. The online research firm Civiqs found in June that voters approved of the movement by a 28-point margin. Rasmussen found 62% of likely voters viewed it favorably and 32% very favorably. This demonstrates that there is a national consensus that the lives of black fellow citizens matter, which has not always been the case in our history. It also suggests strong support for better, fairer policing in minority communities. But that seems far more likely to be because large majorities believe in the principle of the Declaration of Independence that all men are created equal rather than because they support the agenda of the organization with the innocuous-sounding name, Black Lives Matter. Fact is, "black lives matter" is a matter of common decency entirely separate from the activist, ideological, left-wing agenda of the BLM group. That organization has stated aims that go far beyond addressing police brutality. Its goals include, without apology, the upending of American society. Yet it has gained massively more attention, support, and money since the death of George Floyd, an unarmed black man, in Minneapolis police custody. It is therefore important that the public, much of which thinks that by supporting BLM, they are backing obviously decent and humane reforms, knows enough to make the distinction between the idea and...