Some of us don't think humans are less deserving on account of which side of a border they were born. Agreeing that free trade did somewhat hurt the American worker, America's loss helped lift hundreds of millions of people elsewhere (especially China) out of poverty.

It's hard to say they should have remained abjectly poor just so some Americans wouldn't experience a (fairly small) drop in living standard. A drop which could be alleviated by more socialist government policy anyway. From a global perspective, free trade is the best thing for improving the welfare of humans going.