I think some of those policies are a temporarily necessary evil
I agree as well. Subsidizing industries and sanctioning other countries are technically forms of protectionism, but those are conscious trade-offs where we hurt economic efficiency to benefit social welfare and pressure other countries without military intervention.
The thing that doesn't make sense about Annoying Orange's version of protectionism is that he's pretending like it will increase the number of jobs and help our economy. What will happen is that it will bring back
some jobs, but it will hurt more people than it helps.
My enthusiasm would wane if we became too isolationist, but like I said, I'm not worried yet.
We can always wait and see, but I'm not optimistic for the future.