One of the ringleaders of the Delaney Hall mayhem is a former New Jersey early-childhood teacher, The Post has learned. Anti-ICE demonstrations have raged outside the federal immigration detention center in Newark since May 22, when 300 migrants inside went on a hunger strike over what they claimed were inhumane conditions . Ex-teacher Cassandra Magazino, a “nonbinary” radical activist who lives in Pompton Plains, immediately started clamoring to “free the detainees” and “abolish ICE.” “No