NEW: The FBI says the man accused of lighting an incendiary device outside a federal building in New York City is an "anti-American, anti-government extremist."

NEW: The FBI says the man accused of lighting an incendiary device outside a federal building in New York City is an "anti-American, anti-government extremist." 43-year-old former U.S. Army soldier Andrew Arrabaca had anti-ICE literature on a cart with him and yelled derogatory terms at ICE as he w…