GTA V: Random Event: Griff the Fat Washington Patriot

He is just a patriot using his right to complain

Driving West as Trevor, you see a fat guy named Griff dressed as George Washington on the side of the road with a sign saying "This is the land of opportunity, get out!". He is very verbal on is feeling about Mexican and they are not favorable.

You can go up and talk to him if you want. You will ask him about his feelings about Canadians and he will say they are worse than Mexicans as Mexicans at least have the decency to look different than Americans. You can punch his lights out with one uppercut which will make you feel better but not yield any fruit.