Einasser, your specific statement, "monotheism is even older than Judaism Prophet Abraham who was before Judaism and before Christianity was a monotheist."? Umm .... Abraham is considered to ber the father of the Jewish people and the father of the Jewish faith. Ergo, to separate Abraham and the Judaism with regard to monotheism - well it doesn't make sense. i DO realize that Islam actually considers Abraham to be a Muslim rahter than a Jew, but then again, the Mormons consider Charlemagne to be a Mormonl. Just because you want it to be, doesn't make it so.
Abraham was neither a Jew nor yet a Christian
Prophet Abraham was before the Torah; the Torah was revealed after Abraham by a long time; Abraham was a monotheist devoting himself to God alone, and he broke up the idols of his people.
This is in the Quran
3: 65
يَا أَهْلَ الْكِتَابِ لِمَ تُحَآجُّونَ فِي إِبْرَاهِيمَ وَمَا أُنزِلَتِ التَّورَاةُ وَالإنجِيلُ إِلاَّ مِن بَعْدِهِ أَفَلاَ تَعْقِلُونَ ...الخ
The explanation:
(O people of the Bible [lit. Scripture], why do you dispute about Abraham, when [you know that] the Torah [including the Ten Commandments, the Law, the words, the books of the prophets and the psalms] and the Gospel were not revealed but after him? Have you then no sense?
So now, you [Jews] are those who [worshipped idols in the past] argue about [Moses and Jesus: claiming that you follow their religion] that whereof you have knowledge. But why do you argue about the matter of Abraham] that you do not know; God knows [the truth about the religion of Abraham] but you do not know [that.]
Abraham was neither a Jew nor yet a Christian [as you claim], but was a "Hanief" [i.e. a monotheist who served God alone], a Muslim [i.e. surrendering to God's commands], and was not one of the associaters [that associate others or idols with God in the worship.]
The people most worthy [to claim following the religion] of Abraham were his followers [at his time,] as are this prophet [Mohammed] and the believers [with him]; God is the Protecting Master of the believers.)