I think that's JBP's point. If the curves are indistinguishable that means Israel is actually doing better because they have an older population. Israel about 12.5% over 65, Palestine only 2.9% over 65, which is remarkable. You're also right El Gato to point out that they've been pretty consistently tracking each other before and after vaccination. The coming of the vaccine did not result in Israel peeling away - far from it. By the way, "ethnically/genetically similar" - I'd love to see you drop that one in over dinner in Tel Aviv and/or Ramallah. I'm not saying you're wrong but it could be a tad controversial over there. You could take a look at Greece and Bulgaria. Also the 3 Baltic States. Their total vaccination rates are not so low but they have the odd quirk of not vaccinating the majority of the elderly first. "Currently, only a little more than half (54%) of all seniors in Latvia have been vaccinated against Covid-19. The situation is similar throughout Latvia with even the high takeup centers in Vidzeme only slightly better than the rest of the country." It might be memories of the old Soviet propaganda making them suspicious but it seems the elderly are quite resistant to the vaccine there. https://eng.lsm.lv/article/society/society/clear-differences-in-regional-vaccination-take-up-across-latvia.a427638/