Very unlikely. Most Christian Americans believe in the principles of the Founding Fathers, one of the most basic among them being the freedom of religion. I think we are well past the point of forcing religious conversions (unlike the islamists).
Now, the persecution of anti-christians, that's another matter. I think matters may well come to the point where self-selected soldiers for the faith strike out "with great vengence and furious anger."
Do you mean murder based on religious zeal? The Holy Scriptures do not condone such acts. In fact they are condemed. Murder is murder no matter if it is done by a Christian or Islamic terrorist.
Michael Medved was talking to some liberal caller about the 10 commandments and why it is okay to keep them up. Medved mentioned that most of the founding fathers were religious zealots. But they all had their different views and couldn't come up with a "theocracy" that they all would agree on. So-----worship who/what you want!
Ezekiel 25:7