>> If he really said that, Abbott should denounce him.
Really? Piss on our brethren so quickly?
There is a line that should not be crossed, and saying "subhuman" directly after "mongrel" is egregiously inflammatory to persons of color in the U.S. There is no crime in being bi-racial.
Besides, think how effective it would be to denounce only one phrase, "mongrel subhuman." It would make all the others that more pointed.