The thing is that being from Africa his father should have cared more about worse things that happen there.
Modern-day slavery
The "current wave" of slavery in Sudan reportedly began in 1983 with the Second Sudanese Civil War between the North and South. It involved large numbers of "African" Sudanese, "primarily the Dinka, Nuer and Nuba of central Sudan," being captured and sold "(or exploited in other ways)" by Northern Sudanese "Arabs".[11][12] The problem of slavery reportedly became worse after the National Islamic Front-backed military government took power in 1989, the Khartoum government declared jihad against non-Muslim opposition in the south.[13] The Baggara were also given freedom "to kill these groups, loot their wealth, capture slaves, expel the rest from the territories, and forcefully settle their lands."[14]
https://en.wikipedia.org/wiki/Slavery_in_Sudan
If he wanted to mad at the US then he should be mad at Obama & Hillary for blowing up Libya and the slave trade starting up again in the aftermath.
http://time.com/5042560/libya-slave-trade/