Kennedy made it clear that his religious convictions would be walled apart from his political practice.
It is the same argument made by Catholic politicians today when they support laws at variance with their church’s teachings. It was the same argument used by Jesuit priest/congressman Robert Drinan when he lent all his support for abortion.
“Kennedy made it clear that his religious convictions would be walled apart from his political practice.”
Given that Kennedy had no religious convictions whatsoever, that wouldn’t be hard for him to do. In essence, Kennedy said, “My actions will not be affected by things I do not believe...”