““"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof..."If they really wanted to bring God into politics, would they have written that part about "an establishment of religion"?””

I don't think you understand what that part of the first amendment even means. It doe NOT mean that they wanted us to have a christian nation, or wanted us to bring religion into our government. It in facts means the exact opposite.

"The First Amendment of the United States Constitution states that "Congress shall make no law respecting an establishment of religion".

This clause, known as the Establishment Clause, was written primarily by James Madison.

It reflects the widespread agreement after Independence that there should be no nationally established church."