It is not important that The President of the United States
be one religion or another or even another. That is his choice. That is his
It is, however, very relevant that he honor the people of The
United States of America. That he honor and protect the words
and the meaning of "The U.S. Constitution".
It is not only relevant, but he swore an oath to do so. The oath
specified within the text of "The Constitution" were given to him,
he repeated them, and then swore allegiance to them.
"I do solemnly swear (or affirm) that I will faithfully execute the office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."
Don't get tied up in his religion. I don't believe even he knows
which faith he follows. It is just a "red herring" argument to
even mention or question it.
The real question is:
Does the president, through words and actions, preserve, protect and defend "The U.S. Constitution"?
Personally, I don't believe he does. But that is just my thought
based on his actions.