As you probably forgot, jihadis affiliated with Al-Qaeda killed more than 3,000 Americans on September 11, 2001. Since then, thwarting terrorism has been a top priority of American policy and discourse, and the country has agreed, kind of, that even longstanding interpretations of the Bill of Rights are less important than the threat posed by radical Islam. Also since then, self-proclaimed jihadis have killed 26 Americans, while domestic right-wing and anti-government terrorists have killed 48. Those numbers come from the Washington research group New America, as summarized by this article in the New York Times. Ask most candidates for public office, and Muslim terrorists are an existential threat to the United States. Ask law enforcement, and the bigger problem is right-wing extremists.