Look up the speeches of Yuri Bezmenov.
And you can talk about how Sanders wants to implement a "European" model, but taking a model that works for a homogeneous nation of five million and has extremely low unemployment won't work for a "diverse" nation of 350 million with a twelfth out of work and a third on some sort of government assistance.
And you're right, +Michael Deis
, Bernie is essentially trying to undermine and destroy what the nation was founded on. I think that's why he's so popular.