You described the REACTION of the FOLLOWERS of TPTB. The actual LEADERS or INDIDER powers, changed or reversed the master plan, without admitting it or telling their followers. After decades of grooming political correctness to their masses of followers, there was no way they could admit a reversal of political correctness needed to make America great again.
It was emotional political correctness that was used to drain or embezzle the USA. Remember “protectionism is bad” “We need immigrants” “they are only trying to better themselves” “we want free trade” “We don’t need or want the smoke stack polluting manufacturing jobs” “Humanitarian reasons”????
If there was a big economic crisis BEFORE JFK was elected, they would let him stay and go on. It was too early for USA Protectionism. Way too much “meat still on the bone” in the 1960s USA.