I've lived under the U.S. political system all my life, and I think many of us know that it's quite flawed in multiple ways. Though it's not just the functions of the system itself, but it's also a reflection of the political culture, or the overall philosophy of America and the things that people typically believe to be a part of "Americana." It's not just about right-wing patriotism or militarism, but also about America being a free, open, and tolerant society.
I do tend to agree that the charge of "treason" should not be made lightly. I think Joe McCarthy accused the entire Democratic Party of treason. Constitutionally, one can only be accused of treason if they make war against the United States, or if they give aid and comfort to enemies of the United States.
However, what defines an "enemy"?
The Constitution gives Congress the power to declare war, so if they officially declare war, then that would define who America's enemies are. But if it's some kind of unofficial or undeclared "enemy," then that goes into murky, dark territory. That's another aspect of the political culture here in America which is a legacy of the Cold War, which was truly a pointless and wasteful exercise in futility.
As far as what may "come around" in the future, that's anybody's guess. A lot of Americans were well aware we were a nation in decline even back in the 60s and 70s, but the Reaganized 1980s were like some hallucinogenic drug that made Americans forget all their troubles. "Don't Worry, Be Happy" was the Republican theme song, and even the Democrats started singing along. It's only been in the past few years that the effect of that drug has finally started to wear off. A lot of people are wondering aloud "Just what in the heck happened? How did we come to this?"