Israel don't use or need any excuses, because nobody dares to ask what they are doing there, and how legitimate their existence as a state this, a nice example would be this forum where you question the legitimacy of the state (sorry but i have read about it from a wide variety of sources over and over again and i simply cannot understand how you can take over someone elses land based on religious justifications and the fact that you do not have your own land) and you get people accusing you of racism, anti semitism, and reminding you about the holocaust.
speaking of racism, some nice quotes for you:
"We must expel Arabs and take their places."
-- David Ben Gurion, 1937, Ben Gurion and the Palestine Arabs, Oxford University Press, 1985.
"Jewish villages were built in the place of Arab villages. You do not even know the names of these Arab villages, and I do not blame you because geography books no longer exist. Not only do the books not exist, the Arab villages are not there either. Nahlal arose in the place of Mahlul; Kibbutz Gvat in the place of Jibta; Kibbutz Sarid in the place of Huneifis; and Kefar Yehushua in the place of Tal al-Shuman. There is not a single place built in this country that did not have a former Arab population."
-- David Ben Gurion, quoted in The Jewish Paradox, by Nahum Goldmann, Weidenfeld and Nicolson, 1978, p. 99.
"Let us not ignore the truth among ourselves ... politically we are the aggressors and they defend themselves... The country is theirs, because they inhabit it, whereas we want to come here and settle down, and in their view we want to take away from them their country."
-- David Ben Gurion, quoted on pp 91-2 of Chomsky's Fateful Triangle, which appears in Simha Flapan's "Zionism and the Palestinians pp 141-2 citing a 1938 speech.
"There is no such thing as a Palestinian people... It is not as if we came and threw them out and took their country. They didn't exist."
-- Golda Meir, statement to The Sunday Times, 15 June, 1969.
"This country exists as the fulfillment of a promise made by God Himself. It would be ridiculous to ask it to account for its legitimacy."
-- Golda Meir, Le Monde, 15 October 1971
"(The Palestinians) would be crushed like grasshoppers ... heads smashed against the boulders and walls."
-- Isreali Prime Minister (at the time) Yitzhak Shamir in a speech to Jewish settlers New York Times April 1, 1988
"It is the duty of Israeli leaders to explain to public opinion, clearly and courageously, a certain number of facts that are forgotten with time. The first of these is that there is no Zionism, colonialization, or Jewish State without the eviction of the Arabs and the expropriation of their lands."
-- Ariel Sharon, Israeli Foreign Minister, addressing a meeting of militants from the extreme right-wing Tsomet Party, Agence France Presse, November 15, 1998.