“Isolationism” wouldn’t isolate the US, it would merely keep the government from intervening in foreign countries, allowing private contacts, commerce, and trade to flourish. From Jacob G. Hornberger at fff.com:
When President Trump decided to relocate a few troops on Syria’s northern border and announced that he would withdraw all the other U.S. troops from Syria, interventionists went ballistic. They said that Trump was leading America to “isolationism.”
That’s pretty funny, given (1) there is still no assurance that the Pentagon and the CIA are going to permit Trump to withdraw all U.S. forces from Syria; (2) Trump is sending troops that he withdraws from Syria into Iraq and Saudi Arabia; (3) Trump continues to maintain troops in Afghanistan despite having had three years to have taken them out; (4) Trump continues to partner with the Saudis in their brutal war in Yemen; (5) Trump imposes sanctions and embargoes against any regime that bucks his will, including Turkey, Iran, North Korea, Cuba, Venezuela, Russia, China, and others; (6) the Pentagon and the CIA continue to maintain foreign imperial bases and secret prison camps all over the world; (7) Trump has kept the United State in NATO and other entangling alliances; and (8) foreign aid continues flowing into foreign regimes, dictatorial ones.