The majority of Israelis, about 80%, are Jewish. The other 20% are Arab Muslims, Christians, or Bedouins.
According to the general census 75.6% of Israel are Jews, 16.9% are Muslims, 2% are Christian, 1.7% are Druze (a distinct religion in Israel, Lebanon, and Syria) and 3.8% believe in other minority religions like Baha'i.
If by "believe" you were referring to something distinct from religion (such as political beliefs, social beliefs, economic beliefs, etc.), Israel has an incredible diversity of opinion on nearly every issue and because of protections on the freedom of speech, press, and assembly, people can easily express these mutually dissenting opinions.
From the ancient past Israel's system of belief is revealed in the first 5 books of the Hebrew scriptures also known as the Torah or Pentateuch. By name they are Genesis, Exodus, Leviticus, Numbers and Deuteronomy.
Zionism.
Israel is a unitary system.
Israel. That's it.
Bhagavad Geeta is from Hindu belief system.
One example of a belief system is religion. Certain religions believe certain things. Also, science is another example of a belief system.
Israel uses a voltage of 230 volts for its electrical system.
Israel is in Asia, it has the largest Jewish population in the world. Outside of Israel, there are very few Jews in Asia.
Their belief in Reincarnation.
Most Italians are of the Catholic belief system. They believe in a system of priests and pray to saints in addition to Christ.
which belief formed the basis of the caste system in India
the belief system is called confusinism