You can not separate the church from the state. The two are inexorably interwoven.
Lots of atheists and anti-Christian folks quickly point to the Establishment Clause in our U.S. Constitution as the authority for doing all sorts of litigious anti-church, anti-Christian stuff. The Establishment Clause is the ACLU’s mantra.
Our beautiful, powerful, time-honored U.S. Constitution falls drastically short of authority. Man wrote it. Man implemented it. Man resorts to it. Man depends on it to settle disputes. Therein lies the problem–man.
But man is man and God is God. God established the church.
In addition to establishing the Church, the Son carries and controls the government on His shoulders. Not the Congress, not the Supreme Court (which is ironically not Supreme), not the White House, not the Soviet Federation, not the U.N.
For in Him all things were created, things in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities. All things were created through Him and for Him. Colossians 1:16
For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counselor, The mighty God, The everlasting Father, The Prince of Peace. Isaiah 9:6