Separation of Church and State

I am not a trained philosopher, but I do play one down at the corner bar. I also have been regularly reading several blogs by professors of philosophy so I am confident that I can make a technically sound, logical philosophical argument.

Just try to refute this:

The Constitution of the United States explicitly erects a wall of separation between the Christian Church and state.

Therefore, the government cannot tax the Christian Church, and otherwise, it is sometimes not allowed to impose its will upon it.

Christians are forbidden to express their ideas or worldview in the public arena.

I am a Christian.

I am forbidden by the Constitution to express my ideas in the public square, even when they are cleverly couched in secular language.

Therefore, the Constitution equates me with the Christian Church.

Therefore, according to the Constitution, I should not be taxed.

Therefore, I deserve and demand an accounting and repayment of all taxes ever paid... with interest and penalties, of course.