Tell me, if you can, what their tactics might look like. How do they plan to get around the fact that the right is much more numerous, better armed and trained? Most of the armed forces, law enforcement and veterans are over on this side of the divide.
You see the tactics. It was the same with the agitations for more Government--moving to the Left--in the 1930s. It was the same with the Civil Rights Movement in the 1950s & 1960s, including the terribly destructive Immigration Act of 1965. Agitation, nuisance demonstrations, "peaceful" occupations, etc., all punctuated with constant sloganeering--the standard for the Left for centuries--all intended to bend the perceptions of what is right & wrong, fair & unfair.
Of course, if the economics deteriorates to a point where an actual Nazi or Communist type takeover becomes possible, you might look to the German or Soviet model. But the Left has accomplished a great deal--all very unfortunate if you understand how a healthy society works--simply by altering the social & moral perceptions of susceptible elements of the population.
For a contemporary example of the point. You mention the armed forces. I agree with your statement; yet the Administration has now apparently OK'd the oxymoron of "Gay Marriage," for the military! (At least so, it has been reported in a usually reliable source!) Would that have not seemed utterly preposterous even three years ago?
We have too many people relying upon what seems obvious, rather than fully understanding the tactics of those who actually seek to destroy everything we believe in.
William Flax