We need to remember men like George Whitefield and the fact that the seeds of the American revolution were sown by the colonial churches.
Its why the left is so desperately afraid of Christianity, they know that Christians can inspire their downfall.
It's also because Christianity is at the heart and soul of America. You can't fundamentally transform America while Christianity stands. If Islam, Zoroastorianism, Buddhism, Hinduism, Judaism, Scientology, and Mormonism all held the same position as Christianity, only Christianity would be attacked. Because only by removing Christianity can America be totally undone.