Yes. The United States is extremely Xenophobic. Those that aren't, are either normal, or think that the United States is simply superior to other countries.
I think it stems from America's original desire to be it's own boss and have other countries out of its business, but it's spiraled out of control. We're so full of ourselves and worried about other countries that we jump at a chance to blow them up with 80% backing by the populace. You barely even need a reason to do so anymore.
