Theocracy in America?

Fear of a theocracy comes from over exaggerating religions influence on America. .We would have to change the Constitution of the United States to become a theocracy. Which is theoretically possible, since we can amend the Constitution. But changing the constitution to the point when we become a theocracy is beyond highly unlikely. It`s also a blatant disregard of the fact that we are a nation of immigrants. There are many religions in the United States does it seem plausible that we would become a theocracy under one. People seem to have forgotten the first amendment which addresses the freedom of religion. It also prohibits Congressional establishment of a religion over another religion through Law and protecting the right to free exercise of religion. I think people are over exaggerating for propaganda purposes or they don`t know what their talking about.