Remember the anti-Vietnam crowd wasn't all of us either. But those anti-Vietnam/anti-Americans are in the WH now.
The author's point (what I took from it) is that Millennials, who are very convinced that they're right (but really aren't so sure and starting to "believe with their lying eyes"), can be turned away from where the Left has directed them.
Dylann Roof reportedly wanted a race war. How many Americans sympathize?