I think if someone is basically going to call a whole bunch of other people stupid, he should take care to make sense.
"Widespread features of low intelligence"? I don't know what he means in place of 'widespread,' but I'm pretty sure he didn't mean widespread.
"Half of all murders are caused by a particular race"? Uh, no. They are caused by
people of a particular race.
" . . . as a minority group, I'm convinced . . ." So the author is a minority group?
"Despite many years and government efforts, the SAT scores of a certain race. . ." A verb in the subordinate clause would be helpful. As written, it makes no sense.
In any event, racism is nothing new. Thomas Sowell has some interesting things to say about race and IQ
here,
here, and
here.