Incident at Vichy - Arthur Miller

In Vichy France, 1942, a group of men sit outside an office, waiting to
be interviewed. The reason they have been pulled off the street and
taken there is obvious enough. They are, for the most part, Jews. But
how serious an offence this is, and how they are to suffer for it, is
not clear, and they hope for the best. But as rumours pass between them
of trains full of people locked from the outside and furnaces in Poland,
and although they reassure themselves that nothing so monstrous could
be true, their panic rises.

Arthur Miller's claustrophobic play of how the inconceivable becomes allowed to pass, Incident at Vichy is one of the most indispensable, moving pieces of art about the Holocaust.