Come on Kathryn, you know no-one is saying anything of the sort.
But to present documents written by theocratic societies living in North America over 100 years before the formation of the United States as evidence of Christian influance in that formation is ridiculous. As is presenting state constitutions that predate or conflict with the US Constitution.
I believe that people are saying exactly the sort. And I also included numerous documents from the late 1700s as well.
In fact, religious requirements in state constitutions were not specifically outlawed till 1868 - and even then, seven state constitutions were not amended:
Religious discrimination in state constitutions
When the U.S. Constitution and its first ten Amendments were written, the authors included guarantees of religious freedom among the federal civil service and officeholders. Article 6 of the Constitution states:
"No religious test shall ever be required as a qualification to any office or public trust under the United States."
Inclusion of this clause was probably partly motivated by the large number of non-Christians among the authors of the Constitution, including many Deists.
However, many state constitutions -- when originally written -- required officeholders to believe in a God (or Gods or a Goddess, or Goddesses, or a God and a Goddess, or Gods and Goddesses). Most Constitutions didn't specify the number or sex.
After the 14th Amendment to the Constitution was proclaimed on 1868-JUL-21, its Article 6 became binding on individual states. The religious requirement clauses in state constitutions became null and void. The 14th Amendment stated:
"No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States."
Still, the clauses remain on the books in a few states AR, MD, MA, NC, PA, SC, TN & TX), and are occasionally dusted off in the media when someone wants to bash Atheists, Agnostics, etc.