Nine people were arrested as a mob of anti-ICE protesters descended on a Brooklyn hospital and tangled with law enforcement in a chaotic, caught-on-video clash on Saturday night, cops said. The unruly group of around 100 activists arrived outside Wyckoff Heights Medical Center in Bushwick after they got wind that federal immigration agents were in the neighborhood and had taken a man in their custody to the hospital for medical attention, City Council member Sandy Nurse said on X . The mob quickly flooded the streets in front of and around the hospital in what appeared to be an attempt to block the ICE agents from leaving with the man, video shows.  Anti-ICE protesters mobbed Wyckoff Heights Medical Center in Bushwick, Brooklyn on Saturday night Dakota Santiago/FNTV The unruly group of around 100 activists arrived outside Wyckoff Heights Medical Center in Bushwick.…