A Chicago Catholic church acted within its First Amendment rights in demoting and later firing an employee who alleges the church discriminated against him based on age and national origin, according to a federal judge’s opinion.On Tuesday, U.S. District Judge Edmond E. Chang granted the Archdiocese of Chicago’s motion to dismiss a complaint brought against the church by Stanislaw Sterlinski on the grounds that the “ministerial exception” protects the church against Sterlinski’s claim.The case …