Suicide bombings are wrong everywhere, no matter if it is in Palestine or elsewhere.
Shaykh Ibn Uthaymeen (ra), in his fatwa forbidding suicide bombing, said:
...As for what some people do regarding activities of suicide bombing, tying explosives to themselves and then approaching Unbelievers and detonating them amongst them, then this is a case of suicide and Allahıs refuge is sought. So whoever commits suicide then he will be consigned eternally to Hell-Fire, remaining there forever, as occurs in the hadeeth of the Prophet.
Because this person has killed himself and has not benefited Islam. So if he kills himself along with ten, or a hundred, or two hundred other people, then Islaam will not benefit by that, since the people will not accept Islam....
Rather it will probably just make the enemy more determined, and this action will provoke malice and bitterness in his heart to such an extent that he may seek to wreak havoc upon the Muslims. This is what is found from the practice of the Jews with the people of Palestine so when one of the Palestinian blows himself up and kills six or seven people, then in retaliation they take sixty or more. So this does not produce any benefit for the Muslims, and does not benefit those amongst whose ranks explosives are detonated.
Those people who perform these suicide bombings have wrongfully committed suicide, and that this necessitates entry into Hell-Fire, and Allahıs refuge is sought and that this person is not a martyr (shaheed).
(End of the Shaykh's words)