During World War II, the Nazi's loaded Jews onto boxcar trains, and shipped them off to concentration camps to be killed. At no point in that experience was it pleasant for the "passengers". If I was forced to try to find something, well, not "redeeming" of course, or even "remotely positive", but if we can settle with locating one single aspect that we could safely label "somewhat comparatively less hellishly awful than it could otherwise have been, while not intending to detract from the horror", I'd have to go with "at least they were the government's trains (or government commandeered trains), and although they robbed the Jews of everything they had, I don't think the Nazi's forced them to buy train tickets".
