Israel makes decisions geo-politically as a result of their calculations regarding the four aspects of geo-politics.
The term geo-political is a term first used to describe the foreign policy of Germany from 1934 - 1945 and articulated as a rationale for expansionism .. the autocratic ideology coming out of Germany claimed due to economic and political needs and forecasted needs the the empire was compelled to conquer other countries. Ironically this same term is used to describe on a "macro level"and in the purest sense of the term geo-political which is to react, to make foreign policy in response to a countries geographical location, political framework, economic frame work and demography. The actual implementation of foreign policy will be executed using detailed intelligent "micro level" considerations.
Israel will have to make tough decisions and foreign policy regarding their geographical location with enemies directly to their northern border, enemies directly to their eastern border, enemies directly to their southern border and the Mediterranean sea to the west..no where to retreat thus Israel will make a decision factoring in their geography.
Politically the functioning 12 political parties with seats in the Knesset many smaller parties not having seats in the Knesset all have their benchmarks regarding what they think Israel should be and will have to find compromise due to the severity of Israel's risk assessment regarding national security and will react politically. Israel will do what it takes to acheive security deliverables where they can live in peace, quiet and prosperity. The secularist Likud Party, the centrist Kadima Party and the very Orthodox Torah Judaism Party are 3 of 12 seated parties struggling to implement their agendas.
Economically Israel will move to protect their economy and will factor in this variable when making decisions. The United Nations ranks Israel No.16 of 187 countries using a measurement of Human Development Index (HDI) meaning Israel is considered a "highly developed economy" due to a market economy strategy where prices respond to supply and demand. Israel has worked hard to develop industries such as High-Tech, Diamond Cutting, Petroleum, Natural Gas, Semi-conductor, Tourism and Telecommunications and will do everything to protect their advancement. These achievements did not come easily.
Demograhically Israel will make decisions to protect core large segments of their society such as the elderly, children, business community, academia, highly educated, medical community, technology, military and all groups that are core to Israel's prosperity.
Finally Israel only goes to war as a last resort when backed against the wall and when their survival depends on it. Judaism is a peaceful belief system and only believes in 'just wars.' War is conflicting to Judaism because Judaism strives for 'Shalom' peace within the nation as well as with its neighbors and this has been the nature of Judaism since the time of the Patriarch Abraham, through King David and today.
Judaism closely believes in and closely embraces the concept of 'Tikkun' which literally translates to 'repair.' Israel strives to engage in tikkun olam which is repairing the world and as you see war is not a part of this commitment to repair a broken world. Israel would rather repair the world than break it by war. Israel also is commited to repairing ones self individually or tikkun atzmi, repairing their broken communities such as the poor Charedim or tikkun Kehila, repairing the Jewish people as a group or tikkun Am and repairing Israel as a Jewish State or tikkum medinat. For Israel it is difficult to go to war but to protect Judaism and their beliefs and values they have no choice.
For more information see the following Books and Publications: THE MANY FACES OF JUDAISM
Understanding Theocracy, Israel and the Making of Foreign Policy!