Well, he is a quarter black. But mostly he is Thai, and partly he is Chinese, and Tida wants you to know it. “All the media try to put black in him,” she says, rising off the couch. “ Why don’t they ask half of Tiger is from? In United States, one little part black is all black. Nobody want to listen to me. I been trying to explain to people, but they don’t understand. To say he is 100 percent black is to deny his heritage. To deny his grandmother and grandfather. To deny me!”…