You're not describing a civil war, you are describing a revolutionary war. You pose an interesting scenario, however you assume that DHS has the man power and resources to go door to door, house to house... in all 50 states. Local, county and state law enforcement would have to be used. How many county sheriffs would go along with that? I would like to think that not too many would comply. How many Governors would allow it? The FedGov will not be able to enforce any type of gun confiscation without the states backing them up. Further more, If Obama tries to do it via executive order that will be very easy to defeat through state nullification, as well as in the US House of Reps provided the Speaker grows a spine for once.
edit on 14-1-2013 by OptimusSubprime because: (no reason given)