His name is Lindsey Graham and all you have to do is look up his name and 'racist'. It's not your fault. As you said, you didn't know who he is. No harm, no foul. I'll put up with a lot of bullshit from a lot of people, but I just have no tolerance for racists. Stupidest thing I've ever heard from people who didn't choose their skin color either. Former president LBJ, who had his own issues with racism, said something that will stand the test of time:
"If you can convince the lowest white man he's better than the best colored man, he won't notice you're picking his pocket. Hell, give him somebody to look down on, and he'll empty his pockets for you."