Alabama Chief Justice Roy Moore said Tuesday that his effort to stop probate judges from issuing marriage licenses to gay and lesbian couples is not about how he treats gay people.

Moore set up a showdown between federal and state courts when he ordered probate judges to defy a federal judge's rulings striking down Alabama's ban on gay marriage. A majority of judges followed Moore's order; many stopped issuing marriage licenses altogether.

(Related: Only 9 Alabama counties issuing marriage licenses to gay couples.)

Appearing on Bloomberg Politics' With All Due Respect, Moore insisted that he was on solid footing in asking judges to disregard a federal court order.

“It is not only okay, there is no rule that you must regard it. The federal courts and the state courts have equal authority to interpret the constitution, under our rules today in the United States,” Moore said.

The exception, Moore added, was the Supreme Court.

“The Supreme Court authority is the only arbiter of a difference of opinion between federal and state courts, and it would bind state courts.”

Moore also said that excluding gay couples from marriage was not discriminatory: “All persons have a right to marry a person of the opposite sex according to the constitution of Alabama Sanctity of Marriage amendment, and that's just the way it is, passed by the people of Alabama, some 81 percent.”

When asked whether he would attend the wedding of a gay friend, Moore responded: “I've had many friends who are homosexual. I've treated people just like other people. This is not about how I treat people or how I go to a wedding or marriage or anything. It's about the constitution of Alabama, the constitution of the United States.”

“But you wouldn't be reluctant personally to go to a same-sex wedding?” host Mark Halperin asked.

“I would not go to a same-sex wedding, no,” Moore answered.