[4] After his ordination, Regas went to England, where he spent two years at Cambridge University,[3] and pursued graduate studies under Anglican Bishop John A.T. Robinson, who he later referred to as his friend and mentor.

[4] Regas succeeded John Burt as rector of All Saints Episcopal Church in Pasadena, California, in 1966, when he was only 36 years old.

[8] As a long-time national leader of the Episcopal Church, he was nominated as a candidate for bishop of New York, San Francisco, and Los Angeles, but consistently declined in order to continue to build the All Saints Pasadena parish.

[9] As a founder of the Interfaith Center to Reverse the Arms Race, he was a leader in efforts to unite Christians, Muslims, Jews and other faiths to promote peace in the Middle East and worldwide.

[3] Regas was a critic of certain American foreign and domestic policies, reaching national attention in a 1971 sermon, "Mr. President, the Jury Is In", against the Vietnamese War,[11] responding to a press conference by United States President Richard Nixon in which he appealed to the American public to stand behind him about the Vietnam War.

The premise of the sermon was a debate between George W. Bush and John Kerry moderated by Jesus Christ.

In response to the investigation, Rector Ed Bacon gave a sermon called, "Neighbor Love is Never Neutral.