Excellent observation, and one which coincides with the true intent and significance of the requirement of an Oath.
In the Year 1876, a Black Minister, historian, and Ohio State Legislator was invited to speak on the occasion of a celebration of the 100th Anniversary of the Declaration of Independence. In that "Centennial Thanksgiving Sermon" delivered by the Rev. Benjamin W. Arnett at St. Paul A.M.E. Church in Urbana, Ohio, Arnett traced the histories of nations and the ideas history underlying our Declaration and Constitution, documenting his remarks about America's Christian foundations with quotations from Founders, Presidents, and Supreme Court Justices, as well as the Constitutions of the States.
Of the Oath of Office, he said:
"Oaths and affirmations are appeals to God, by him who makes them, that what he has said, or what he shall say, is the truth. It is the most solemn form under which one can assert or pronounce anything, and its violation is a crime of the darkest hue; one which God has declared he will punish; one that is made infamous and punishable by fine and imprisonment, by the laws of the land. Thus Christian obligation is required of every officer of the general Government, who fills any position of trust, honor or emolument. Many reports are required in the form and shape of affidavits."
Every lover of liberty should read all of this remarkable Sermon whose theme is "Righteousness Exalteth a Nation, but Sin is a Reproach to Any Nation." Here is a link through which, by clicking on Arnett's name, anyone may access and read a full text version.
Please don’t make me compare these two side to side. That would be like abuse. I think I’ll end up in tears.