A thematic resonance with Gaza - hadn't really thought of that, but there are a few parallels you could draw, yes. For one, there's a bunch of chapters set in Madrid, which survived almost two and a half years of siege/blockade, albeit a siege of a rather different kind than the one in Gaza. And there's the theme of exiles, and how they view the country they left behind - I'm inclined to say the strongest passages in the book are a few of those describing the exiles.

On the whole, though, I would say it makes more sense to compare it to real civil wars, conflicts which really tore families and villages apart. In the case of the Israeli-Palestinian conflict, there were rather few genuinely mixed communities that were torn apart, and even fewer families. And the novel only touches sporadically on the actual war, the armed struggle itself - there's far more attention for how it was reflected in civilian life, the small betrayals and petty cruelties, the turning in of old friends and acquaintances to the authorities, the refusal of the fascist authorities to acknowledge the validity of non-religious marriages concluded during the Republic, and so on.