Don't even believe the free trader if they told you. They classify 'frozen pizza' production as manufacturing.
And they won't answer what's to happened to the unemployed.
Does it bother your if your job is taken by somebody else in your town if they can do it more efficiently than you can? I imagine so—nobody likes losing a job—but would you think that the government needs to step in and stop your employer from trying to be as efficient as possible, at making a profit, and at providing goods and services to consumers at the lowest price possible?
Would it bother you if your job was taken by somebody in another country? Why? What’s the difference whether they are your neighbor or somebody in another hemisphere? That the work gets done, is what’s important. The increasing exportation of labor-intensive manufacturing is a sign of increasing prosperity, not decreasing prosperity.