Which we have in plenty. The hostility of blacks toward whites, though seldom discussed, is powerful. Trouble also brews unnoticed between blacks and Hispanics as Hispanics, more industrious than blacks, begin to outnumber them. Hispanics show up, work hard, follow instructions, and behave well at work. They are fast taking unskilled jobs that blacks once had.
Blacks know it.
So do Hispanics. Characteristically, when relations between the US and Japan were strained a while back by the rape of Japanese girls in Okinawa by GIs, no photographs of the assailants were published in the mainstream media. If so, I'm not privy to it. However, journalists see the danger of serious conflict. Editors know that the United States is not magically immune to the ills of Ireland or Yugoslavia.