I think you have this figured out. This is targeted at Tea Party members, gun nuts, and other misc. freedom lovers.
When I was an instructor in the Navy, NIS would interview me as part of the security clearance checks for former students. One of the first questions was always “Is he a true blue American who is loyal to the government and the Constitution?” Now, this was 1983 and Reagan was president, so I believed that the government and Constitution are virtually the same thing.
But, if someone was doing a background check on me today, any of my friends would have to say “Yes, No, and Yes” to that question if they were being honest.
Part of this EO is aimed at eliminating whistleblowers by insuring that people who don’t have leftist ideological purity aren’t placed in a position to blow a whistle.