Neither O'Donnell, Giglio nor you, Dread; matter at all in the wisdom being expounded upon. You're unimportant; unauthorized to speak of spiritual matters.
O'Donnell is correct; Obama's "inauguration" is altogether irrelevant. He is plainly ignorant about the Word of God. His intent is not to swear an oath but to pander to voters. To do it he must egregiously pretend he's a Christian.
A faithful Catholic won't take any of this seriously. The Bible is NOT Christianity's sole rule of faith; but rather WHO is authorized to expound on the Will of God. Andy 544 is no better authorized in that than Lawrence O'Donnell or pastors (so-called) who administer the spurious oath.