I have not kept up with that item enough to know the details other than a few headlines here and there.
However, historically speaking every time things get too far off center no matter what type of government you are talking about you start to see conflicts like this arise. More specifically anytime you have an oppressive or perceived oppressive government, armed "revolt" or "insurgance" or any other name various things are called is prone to come up.
With all the "scandals" in the last few years, NSA, IRS, Benghazi, Snowden, executive orders, backroom deals, monthly rewrites of congressionally passed laws with no congressional review, fast and furious, immigration, targeting of reporters and selective killing of news stories by high placed political figures, I am not at all surprised to see items like the above start to appear.
Normally it starts with the select few "whack jobs", and if the perceived or real govt. oppression still continues unabated, historically it spreads and ceases to be fringe or whackjobs.
History has many such events, The revolt of the colonies, the overthrow of the czars, the rise of the Nazi party, the arab spring. Once a fuse is lit it does not take much to fan the flames.
Our founders saw fit to create the governing body in such a fashion as to provide checks and balances, and in reading their writings of the period they were very aware of what can happen when any one group holds too much power or attempts to subvert the system.
It is a dynamic time in our countries history. I see us at a crossroads right now that can tip either way, back into a stable checks and balances system or equally possible is the fall into chaos and protracted civil unrest/war.
Political leaders are only political leaders if the people see fit to follow them. In a country such as ours founded and grown under the concepts of freedom, and a persons right to choose their path in life, we were able to go from a set of 13 backwoods territories into a world superpower. However those same qualities also limit how much our population will suffer from unethical politicians, and power mongers. There are examples in both governing parties of what is wrong with the country at present. the fact that our current president has several sound bites out there saying things like "I am the president, I can do whatever I want" only serves to throw a can of gas on the already flickering flame of unrest.
Ancient curse, "May you live in interesting times" I think the next 10 years has the potential to become one of the larger chapters in the U.S. history books of the future. The question is if that chapter is something like 1770 to 1785, 1860 to 1865, or 1950 to 1990. With current world events it may even be something similar to 1914 to 1918 or 1940 to 45.
Interesting side item. Currently the country is seeing unprecedented growth in firearm sales and production with many companies building new facilities to keep up with consumer demand. I grew up hunting and shooting, but the huge surge in sales is not coming from "backwoods rednecks" like me. Many are previously non-gun owners.
To be an anti gun president, Mr. Obama's presidential term is seeing the highest increase in civilian gun ownership in the last hundred years or so. That fact alone should make all politicians on both sides of the floor take a long hard look at what they are doing and how they are going about doing it, especially before they decide that "I am so and so and I can do whatever I want"