Understanding why- my brief take on Judaism = Christianity - Islam.

Judaism in line with the Judeo-Christian - Islamic religions or the religions of the Book, is the foundation, the historical building block from which all three religions has emerged. It is still the eldest of all three religions and still maintains in many ways the Jealous God of Yahweh.
In Exodus 20:5, it is not that God is jealous or envious because someone has something He wants or needs.Exodus 20:4-5 says, “You shall not make for yourself an idol in the form of anything in heaven above or on the earth beneath or in the waters below. You shall not bow down to them or worship them; for I, the LORD your God, am a jealous God...” Notice that God is jealous when someone gives to another something that rightly belongs to Him. 
Jehovah (Yahweh)The proper name of God in the Old Testament ; hence the Jews called it the name by excellence, the great name, the only name, the glorious and terrible name, the hidden and mysterious name, the name of the substance, the proper name, and most frequently shem hammephorash , i.e. the explicit or the separated name, though the precise meaning of this last expression is a matter of discussion (cf. Buxtorf, "Lexicon", Basle, 1639, col. 2432 sqq.).
In the oldest biblical literature, Yahweh is a typical ancient Near Eastern "divine warrior" who leads the heavenly army against Israel's enemies;^[6] he later became the main god of the Kingdom of Israel (Samaria) and of Judah,^[7] and over time the royal court and temple promoted Yahweh as the god of the entire cosmos, possessing all the positive qualities previously attributed to the other gods and goddesses.^[8][9] By the end of the Babylonian exile (6th century BCE), the very existence of foreign gods was denied, and Yahweh was proclaimed as the creator of the cosmos and the true god of all the world.^{[9] Wikipedia.}

Judaism did not come into being until after the time of Abraham whose second son Isaac was the progenitor of the Jewish bloodline. Abraham's first born was by his maid servant who later went on to become the prognitor of the Arab Muslim Lineage that led all the way to that of the Prophet Muhammad (SAW) and this includes all the prophets of the Biblical lineages, including Jesus (AIS), son of Mary.

But Abram was concerned, because he had no children and he was growing old. Abram's beloved wife, Sarai, knew that she was past child-bearing years, so she offered her maidservant, Hagar, as a wife to Abram. This was a common practice in the region at the time. According to tradition, Hagar was a daughter of Pharaoh, given to Abram during his travels in Egypt. She bore Abram a son, Ishmael, who, according to both Muslim and Jewish tradition, is the ancestor of the Arabs. (Gen 16

When Abram was 100 and Sarai 90, G-d promised Abram a son by Sarai. G-d changed Abram's name to Abraham (father of many), and Sarai's to Sarah (from "my princess" to "princess"). Sarah bore Abraham a son, Isaac (in Hebrew, Yitzchak), a name derived from the word "laughter," expressing Abraham's joy at having a son in his old age. (Gen 17-18). Isaac was the ancestor of the Jewish people. Thus, the conflict between Arabs and Jews can be seen as a form of sibling rivalry!
Judaism 101.

The next simple question that was never really resolved by both Jews and Muslims is, who was intended for the sacrifice that God had asked of Abraham. The Jews claims it was Isaac and the Muslims , Ismail. Who do you think it was? If what is going on in the Middle east and around the globe today matters to you, the answers is might help you see the truth. Question is does it matter enough to you?
to be contd.