Foreigners seem to butcher this point with the American exceptionalism BS. There's a simpler and more honest explanation: Americans think American government policies should favor creating American jobs over foreign ones. We lost hundreds of thousands to millions... who knows what current count is... of jobs to outsourcing by greedy businesses. Buying power and stability keep going down which sends ripple effects throughout the economy.
The Trump supports likely want the job security more than the belief that their uniquely perfect or something. I want it to even though I'm a Trump opponent. Incentives for this country should reward people in this country rather than destroy their future.