I almost stopped at "southern poverty law center", but I took a grain of salt instead. It's good that I kept reading, so that I could learn that "all lives matter" is considered to be "hate speech".
For a statement noone thought to make until black people started asking to stop being wantonly murdered by cops and which only the sickest people would think to abuse into a "response" to such cries against what is in effect ethnic cleansing it does sure attract a lot of controversy.