What is the main contradiction between Israel and Arab countries?

Mainly religious conflicts and territorial conflicts.

In the Six-Day War of 1967, Israel conquered the West Bank of Jordan, the Golan Heights of Syria and Gaza and Sinai Peninsula of Egypt. On 1982, Israel withdrew all its troops and colonies from Sinai Peninsula, and on September 12, 2005, it completely withdrew from Gaza. However, the ownership of the West Bank and the Gaza Strip remains unresolved. East Jerusalem has been under the jurisdiction of Israel since 1967, and the Golan Heights has been under the jurisdiction of Israel since 198 1, although neither of them is the official territory of Israel.

The sovereignty of the State of Israel, excluding all the territories conquered by Israel in 1967, has a total area of 20,777 square kilometers (1% water area). If the area under the jurisdiction of Israeli civil law, including East Jerusalem and Golan Heights, is 22 145 square kilometers, and the water area is less than 1%. Including the West Bank, which is under the military control and autonomy of the Palestinian government, the territory controlled by Israel is 28,023 square kilometers.