Actually, JSP specifically said "non-citizens" above. Which was pretty stupid, and entirely normal behavior from him.
As for the rest of his argument, he'd probably do better calmly pointing out that the predicate act was, in fact, the complainant's illegal entry into the country and trespassing on private property, and it's pretty questionable (wrong, I believe) to hold others responsible for their actions. Seems like a better argument than his typical xenophobic "Keep the damned spics off my land!" nonsense.