> Compared to the civil rights era, the past few decades have been a blip.
The difference is that in no moment in history have foreign agents been able to influence the psychology of US citizens as much as in the past 20 years. Considering the effectiveness of information warfare, the link between the appearance of these weapons and the effects we would expect to see, and are indeed seeing now, a generation later, is pretty clear to an outsider.
While you are still in disbelief that anything nefarious is happening, and can be in outright denial and even label those who mention this possibility as xenophobic, you will continue to see the progressive destabilization of your system. This is the way information warfare works.
Boots on the ground won't protect you from an invisible enemy.