Unfortunately we can't turn back the clock and go live in 1920's America, isolationist and wary of anything foreign.
It's not America that needs to decide anything. Like it or not, we are in a global community and there are quite a few people who need to get it together for themselves and their countrymen.
If you have no economy, no hope for your young, an unstable political environment... you can strive to do better and join this world community.
Or else you can blame the Jews and the US of A... that theory and $2 will buy you a cup of coffee at Starbucks.
Even in the 1920s we weren’t “isolationist.” The so-called “Banana Wars” continued in the 1920s.