Fortunately a Tradition, instituted in the 50’s by President Eisenhower, after the winning of freedom for the world by the USA and Allies, God granted us freedom...we must fight for the freedom to remain, one symbol, one iconic phrase at a time...let freedom ring! Thanks be to God!
The motives were not quite so lofty. It was more to differentiate ourselves from the evil godless communists. We have it on our money because some idiot thought that if some future archaeologist was digging up our society, we wouldn’t want them to think we were heathen.