You're right, it's because unlike France we have guns and if people start to turn on their government they know veterans and soldiers would more than likely help us, rather than them. There are 350 Million people in our country at this time.
The digital army only goes so far. And the people that lean far left also want to take down govt. in their own way, uniting both sides with a common goal would be a nightmare. The only good option they'd have is to bomb us, and if that happens, well…God has a special place prepared.