The title “Gaza Mon Amour” carries threatening echoes of those cutesy auteur short anthologies (“Paris je t’aime,” “New York, I Love You”) in which assorted drifting souls find love in the same scenic city streets. Happily, Palestinian twin filmmakers Arab and Tarzan Nasser’s entirely self-contained feature is nothing so slick or glib, though it boasts internationally flavored romantic whimsy in spades. Mixing a minor-key midlife love story with gently politicized farce against the turbulent backdrop of the Gaza Strip, the Nassers’ amiably shaggy film does, in fact, feel a little like a gossamer-weight short that has been stretched to breaking point at a hair under 90 minutes — only just sustained by its vivid sense of place and the unforced charisma of stars Salim Daw and Hiam Abbass.