First, the Attendance Order did not burden Fields’s religious rights because it did not require him to violate his
personal religious beliefs by attending the event; he could have obeyed the order by ordering others to attend, and he has not contended on appeal that he had informed his supervisors that doing so would have violated his religious beliefs. Second, the order did not violate the Establishment Clause because no informed, reasonable observer would have perceived the order or the event as a government endorsement of Islam. Third, the order did not burden Fields’s right of association because it did not interfere with his right to decide what organizations to join as a member. Fourth, Fields’s equal-protection claim duplicates his free-exercise claim and fails for the same reason. And fifth, the district court did not abuse its discretion in denying Fields’s motion to amend the complaint to add ORFA and free-speech retaliation claims because the amendment would have been futile. He has provided no reason
why his ORFA claim could succeed when his religion claims under the First Amendment do not. And his retaliation claim would fail because the interests of the Tulsa Police Department (TPD) as an employer outweighed Fields’s free-speech interests in filing his suit"