The opposite, granting Palestinians citizenship allows them to potentially control the government.
Compare that to any point in our lifetime, where Israel has been their defacto government: Palestinians must report each birth, each change of address to a "foreign" government. If they want to leave their country, they must seek permission from the "foreign" government. If they want to visit their family across town, they must present identification to a "foreign" government.
Citizenship ends apartheid.
Have you tried voting harder?