By clinging to American primacy through force and intimidation, Donald Trump is, ironically, undermining US global power. A saboteur trying to subvert US interests from the inside could hardly do better than what he’s accomplished through sheer incompetence.
Some could just be blissfully unaware, only thinking about short term profits. Tax breaks and stock market manipulation stuff. I see this as a decent probability for at least some of the trump sycophants.
Could also be denial. They might actually believe, incorrectly, they’re strengthening US power. Who knows what mental gymnastics they’re going through.