It takes time for the economy to adjust to fewer low-paid foreign migrant workers. In the short time, this causes dislocation.

Over a few years, Americans will adapt to taking the jobs migrant workers used to take, when these jobs are offered at decent pay rates. This is what the market is good at.

One adaptation needed will be to change the habits and laws that exclude a substantial fraction of Americans from so many kinds of jobs. A journalist published where the troll got the video he used to threaten CNN with violence, and now the journalist is receiving death threats from neo-Nazi supporters of the troll.