He is NOT a Muslim, but an American-hating, Jew-hater nonetheless. And he’s a (book)smart guy - National Merit Finalist, top B School grad, IT expert - that’s scary in itself.
Nothing in the story to indicate that he is or that he is NOT. Really doesn't make that much difference in this case, though. He should be charged with threatening violence against a federal official and prosecuted criminally for such a crime.