I saw a screening of this at the BFI Festival with a short Q&A with Robin Campillo, the director. After a brief study of life at the Gare du Nord it pivots into a fairly straightforward home invasion film but then pivots again, while exploiting the viewers sympathies, to create a totally different kind of film. Like Haneke’s Caché (Hidden) it contains a core study of hostility mixed with hospitality (the director had a French philosophy term for this).
It requires you to suspend your disbelief a few times but I was interested to hear the director and an audience member argue about whether the main character had been drugged in an early scene. The audience member didn’t seem to care what the director intended – the truth of the film for him was already established and the director couldn’t change that.