It used to be, however, that you had to be an Israeli citizen to attend an Israeli medical school in a regular program (that is, not in a program meant for American students). This is not a problem for InNY, as his father is Israeli. However, there are a couple of reasons why this is may not be the way to go:
1) Israeli programs (not the American designated ones) are VERY VERY VERY competitive (did I remember to mention that they are competitive?!). Very few foreign born Jewish students are accepted. I put the emphasis on Jewish because, until very recently (and I am not sure this has changed), you had to be an Israeli citizen to be accepted into the regular program at Israeli medical schools. This would only qualify people such as InNY, who are children of Israelis, and Jewish students who are able to take immediate citizenship (if they wish) upon arrival in Israel, based on the Law of Return. InNY, by being the child of an Israeli citizen, doesn't have the choice of whether he wants to become a citizen or not, By Israeli law he is automatically a citizen, which would enable him to apply for a regular Israeli medical program, assuming he is a very competitive candidate, but which would lead to the next issue:
2) As an Israeli citizen you are going to have to serve in the military. This used to be a huge issue for children of Israelis, which felt that they could not go to Israel to visit, after age 18 because of the draft. This lead to a "softening" in the laws, so that now these people can go and visit without running into problems with the draft board. I assume that InNY would not have an issue with this if he went to the American Program at Sackler. However, if he wanted to enroll in a regular medical program in Israel, he would have to commit to serve 1 year in the army for every year of school (which makes 6 years, instead of the regular 3 years for men and 2 years for women).You don't get all the great benefits in pay that an American medical officer gets (although you used to be able to enjoy great working locations such as the West Bank and Lebanon - which now are no longer avaliable to be deployed to - in all fairness though, Israeli trauma surgeons used to be the best in the world, mostly because they got so much oportunity to learn and practice). Therefore, for many years, factor 1 (competitiveness) + factor 2 (3 additional years of military service) have sent many Israelis to European medical schools.
Factor in a third element: medicine in Israel is socialized, so you don't earn that much. You have oportunities to practice great medicine (at modest salaries)at places such as Hadassah, or great research at the Weizman Institute, and then you have...Kupat Holim (where you will have the wonderfull opportunity to exchange views with your Russian colleagues, aaaaaaargh, at even more modest salaries).
Back to the original question, I think Sackler is a great program and living in Israel for a few years, would be another plus for choosing their program. The country is beautifull plus you get to fulfill all these idealistic relocation motivations that we are so famous for... Living in Israel is not for the faint at heart though, and it has nothing to do with terrorism. But I am sure that InNY is well aware of this last consideration