The actual history of economics and the rising wealth of trading nations has proved the total opposite.
Left-wingers excel at unproven theory while right-wingers look at actual evidence and proven theories.
I look at China today versus 30 years ago and the US today versus 30 years ago and I see two countries that are better off. I see two countries which will eventually be allies versus two countries destined to blow each other up.
There is no such thing as a sure thing, but I think the odds favor such an outcome. I certainly hope so.
American protectionism was right wing doctrine before the advent of the globalists.