“Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.”
Note the exact wording of this. “—no law respecting an establishment of religion, or prohibiting the free exercise thereof.” This clearly states that the government will not establish an official religion. It also obviously says that every American has the Constitutionally-protected right to worship as (s)he sees fit. Period. Congress cannot legislate against religion. This is crystal clear to everyone except the American courts. The courts, unfortunately, have chosen to override the Constitutional rights of many Americans over the past fifty years. This has confused the American public so that most people today believe that we have freedom from religion, instead of freedom of religion.
What does this mean? Very simply it means that the Ten Commandments cannot be banned from public locations.