Both countries are being unreasonable. Both countries are being aggressive. Both countries are currently controlled by extremists. Both countries are a huge threat to the stability of the Middle East. You can't slap sanctions on Iran, but allow Israel to contine to ignore UN resolutions, and keep an entrire people locked up, while they try to steal its land. The only way you can fairly put sancstions on Iran, is if you do the same on Israel. Sanctions on Israel would also make it FAR more likely that other countries would support sanctions against Iran and that Iran would abstain from nuclear weapons.
Amir Guttfreund, award-winning Israeli author, dies at 52 (Haaretz)
from the article: Barak: Iran poses no immediate existential threat to Israel