"I have seen some behavior that really is treasonous, not just some liberal whining but actually giving aid and comfort to the enemy. I can't fathom why speech designed to aid our enemies is untouchable."
You're absolutely correct. I, too, wish I had a more analysis. But, the Left has stealthily "redefined" certain of our formerly bedrock traditional values and concepts, mostly via their "politically correct" tactics, which have been carefully designed to alter both the words we use and the ideas they connote. Activist judical appointments support and uphold this type of thing (as, for example, by validating "hate speech" legislation, or the removal of verbal references to God, while simultaneously upholding flag burning, and giving "aid and comfort to the enemy," on the basis of free speech).
The furious and calculated assault on the very life of our constitutional republic has been well planned; and the challenge to true patriotic Americans is considerable.