Alright, dig and ye shall find, there's more:
Israel harvested organs without permission, officials say - CNN
THE ORGAN TRADE: A Global Black Market; Tracking the Sale of a Kidney On a Path of Poverty and Hope - New York Times
The main gist of it seems to be that Israel had no laws against organ trafficking until 2008, which meant many people, Israelis, Palestinians, other foreign workers, had their organs trafficked/sold without permission from their families. Israel has acknowledged that the government itself would do this in the early 90s but that the practice was stopped, but then until 2008 the organ black marketed operated more or less freely in Israel through various off-the-books organ brokers.
The main problem seems to be that there's a perception that Jewish tradition forbids organ donation as a "desacration" of the body, so donation rates are way lower than in most countries and there's a huge shortage. I nonetheless don't think the Israeli government carried out mass organ harvesting from Palestinians specifically or that it had a policy of killing Palestinians for their organs - that would be too extreme, even for Israel - but nonetheless it's likely that the delay in putting laws in place (2008?? Really??) and the black market in organs probably affected more Palestinians due to the fact that they're so poor.