Oh I got it now! He re-arranged the words so they dont say what he meant and he wouldn't mean to say that anyway because he likes mexicans and even if he doesn't he wouldn't say they're rapists because he really means someone else!
"When Mexico sends its people, they're not sending their best. They're not sending you. They're not sending you. They're sending people that have lots of problems, and they're bringing those problems with us. They're bringing drugs. They're bringing crime. They're rapists. And some, I assume, are good people."