We have to repent nationally. That means many current American Jews and Muslims, as well as Hindus, Buddhists, Atheists, Transhumanists, Wiccans, et al. would repent and turn to Christ. After that, there may be a place for minority religious populations to dwell in the US in limited numbers via a sound and rational immigration standard and as long as they agree to abide by the laws governing the land (which will reflect a broadly Biblical standard of justice and governance).