The United States was founded on principles of Freedom of Speech and Religion as set by Founding Fathers.
Turkey with its outrageous authoritarian regime tortures people, violates basic human rights and freedoms of Speech and Assembly. Since the days of the unsuccessful coup attempt, Erdogan regime overpassed any legal limits, detained thousands of professors, journalists and human rights activists. Amnesty International and other human rights organization recorded at least 60000 victims of Erdogan regime within a past week. Turkey regime blocked European Human Rights Pact and committing antidemocratic actions all over the country.
It would an international crime to extradite Fethullah Gulen to Turkey, because he will face inhumane treatment, torture and possible death.