This has nothing globalism. It's a fact that Al Qaeda and ISIS killed Americans and became threats to this country and US interests abroad. And, another terrorist group will do the same thing if we leave Afghanistan. Staying is putting America first.
There is no differnece between Paul and Obama on foreign policy. He's a dove and isolationist.
Secure the borders and make sure only decent people come into the country - exclude middle easterners. If we had done that, 9/11 would not have happened.