These ideas are much older than the ACLU. Just because the ACLU abuses them, doesn't make your abuse of the Constitution any better.
My assertions are supported by Supreme Court decisions, legal opinions and the intent of the Founders. You yourself admit that your interpretation is the result of changed expectations of the meaning of the First Amendment. If you want to agree with the ACLU that any preference or promotion of religion violate the Wall of Separation, just don't claim that you are following the Founders who did not hold this definition of Separation at all.