There is no separation of Christian "duties" between freedom and tyranny. While we are certainly called to care for the needy and all you cite, Christians are also always called to oppose tyranny in the government realm. How many Scripture passages can you recall where the people of God stand, and are called to stand, against tyranny? Plenty!
Christians are people who have a right to have a voice in government same as everyone else, their Christians morals inform their decisions same as everyone else’s morals or lack of them.
The only “separation” is that government not make laws creating a state church (and allowing government to define what a church is violates that) and government cannot interfere in the free exercise of religion (which is does a lot).
There is no wall. It is a limitation on the power of government, not people of faith. As a matter of fact the whole Bill of Rights is about limiting the power of government.
I agree. Christianity encompasses all aspects of an individual’s life, or should.
Tyranny is when government encompasses all (or more than very few) aspects of an individual’s life. This necessarily forces God into a subordinate role.
The main evil of Sharia Law, philosophically speaking, is it combines religion and societal law governing secular behavior. Of course Islam is a religion in the same way the Mob or the KKK is a religion, but I digress.
The root of evil in Baal worship was the combination of religion, family, commerce and law under one umbrella, all controlled by religious authorities. Byzantine society had similar issues.
Our current situation resembles the system of Baal, except controlled by unelected bureaucrats.
Yes, there are many passages imploring Christians to stand against tyranny. How many pastors will stand for separating the Schools from the State?