No.
The same people who are talking about a new civil war/armed revolt/etc are the same butthurt wannabe-confederates who spent the eight years under Clinton saying the same thing. IIRC there was no armed revolt that took place. I have no reason to believe it'll be any different this time around.
I do, however, believe we'll see an increase in attacks on things like abortion clinics, synagogues, etc. now (which we've already seen). Ignorant, xenophobic, paranoid yahoos thought they were safe under Bush (who saw passage of the Patriot Act, the most "big brother" thing that this country has ever done, and illegal wiretaps, detentions without miranda rights or charges, etc) now think Obama gonna come 'n take their dadburn guns.
...we're in for a fun 3-7 years.