He won on building up the military, peace through strength and destroying ISIS. He did not win on an isolationist foreign policy.
I agree that ISIS should be destroyed because it wages attacks against the US and Western countries, just as Al Quaeda and its Taliban enablers needed to be destroyed after 9/11. What I don't agree with is using ISIS and 9/11 as an excuse to wage war and occupy nations that have nothing to do with either, or as an excuse for staying for decades after the military operations are complete to nation-build.
He also didn’t win by supporting endless “Compassionate” wars lasting decades, costing lives and trillions in American treasure.
America First!
Learn it!