And the Pledge of Allegiance was written by a socialist who wanted children to do a Nazi-like salute while reciting it (to be fair, it was pre-Nazi, which is why we put our right hand over our heart instead), but was co-opted as a conservative statement of loyalty to the flag and the republic.
And the Christmas tree and wreath were co-opted from pagan religion, and All Saints Day was scheduled to co-opt Samhain. Christ is the Lord of the Universe, and deserves all praise, including and especially that which was meant to be scorn.
And when I pledge allegiance to the U.S. flag in the middle of a sanctuary in the middle of a worship service, I am pledging loyalty to my country as a subset of my loyalty to my Lord. When the country deviates from the Lord, we must obey God rather than man; otherwise, I love my country as part of my love for Christ, because it is by the blessing of God that I live in peace and prosperity in a peaceful, prosperous land.
Deuteronomy 6:10-12
"Then it shall come about when the LORD your God brings you into the land which He swore to your fathers, Abraham, Isaac and Jacob, to give you, great and splendid cities which you did not build, and houses full of all good things which you did not fill, and hewn cisterns which you did not dig, vineyards and olive trees which you did not plant, and you eat and are satisfied, then watch yourself, that you do not forget the LORD who brought you from the land of Egypt, out of the house of slavery.