I'm curious if whoever downvoted me has read the "We The People Act".
What it does is use a legal trick called "jurisdiction stripping" to take several classes of cases out of the jurisdiction of Federal courts (including the Supreme Court). In particular, it removes jurisdiction over cases involving abortion, same-sex marriage, sexual practices, and establishment of religion (with the exception that if the Constitutionality of a Federal law is challenged, Federal courts have jurisdiction).
This would, among other things, make it so that things like the clause in the Texas state constitution that requires office holders to acknowledge belief in a Supreme Being (and this making atheists and Buddhists ineligible for state office in Texas) legal. Right now, that clause has no effect, because any attempt to enforce it would fall to a challenge in Federal court as a violation of the establishment of religion clause in the Constitution and the 14th Amendment. Under "We the People", no challenge could be brought in Federal court.
It would be OK if "We the People" passed for a State to actually establish an official state religion, or to outlaw specific religions.