What you know: People emigrate from Mexico to the USA seeking a better life. They do this legally and illegally, and while crime does occur, it happens among a small portion. This is a complex issue.
What you say: When Mexico sends their 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 bring those problems with us. They’re bringing drugs. They’re bring crime. They’re rapists. And some, I assume, are good people.
The lesson: NEVER overestimate your marks; easy scapegoats and simplistic solutions are your friends. Redirect their anger towards convenient targets, stir up their racial and social prejudices, and you will rise to the top.