Of course his right to say hateful things must be protected. But as a member of a community that values insightful comments, I feel obliged to point out that his opinion is based mostly on his personal hate and ignorance.
Asking for a limit on immigration from islamic countries to or developing alternative energy sources still is pretty objective to me. But adding the " the Arabs will just go back to what they were before - a bunch of desert nomads with no real power" makes it obvious where he is coming from.