Different people see different things on movies. This, which may be an obvious statement, is specially true about Train de vie. So let me explain what I found, IMHO, marvelous about this movie, and why I would recommend it.
First of all, Train de Vie doesn't try to make a point about the Holocaust - is is just the perceived driver from which this community tries to escape. How this peculiar escape plan (with all odds against success) develops is just an excuse for portraying how war, religion, prejudice, ideologies, etc, end up affecting the life of simple people. Only that, instead of watching an emotionally-filled movie (which is Ok to me, but its not the only way to tell a sensitive story), we are presented with this in a more subtle way: as a townspeople tale where each of these real-world factors is reflected - in a mocked, twisted, funny way- inside the train environment. Communist dogma, nazi's 'ethnic order', social privileges, military commands, everything from which this community was isolated is suddenly 'infecting' people on the train, of course, with absurd consequences that go against the very goal of the community, life - just the same effect the outside-train world is suffering.
I'm not trying to say this is the one and only intention of the movie, yet, it is what I value the most. As for the rest of it, being a tale of townspeople, its characters are stereotyped yet intimate and natural in their motivations; from the music to the dialogs and comic situations, nothing is forced here. And you can end up laughing at the oddity of all this world, while thinking of just how tragically resembling of our own real world it is - something the ending just reinforces.
Whether you choose to see all this as a marvelous tale or as an offense to common sense is up to you; but certainly, there is a lot more to be watched throughout this story than its ending or its historical correctness. And I can hardly see any antisemitism on this.