"State Security" as defined by a handful of war-mongers living in the past and bent upon visiting its ghosts on the present, and sadly, the future generation.
So long as they are doing this to target legitimate national security threats, it isn't. There is no filter on free speech nor any hint that one might be coming. Right now it's just overzealous prosecution that is nipping at the 4th amendment. The 1st amendment is secure for now.
US seems to have state religion now, that is State Security. Sin and get destroyed. Reminds me of USSR in that regard.