An exercise in futility
You have to wonder whether deporting a Nazi war criminal back to a country that still has trouble reconciling with its World War II past will do any good.
Like a good number before him, he will likely pass away as the court system over there drags its feet.
The most egregious example of this is, of course, Aleksandras Lileikis, another Massachusetts resident before getting deported, who died at age 92 while the trial was ongoing.