What IS MONOtheism

Monotheism: Natural Instinct*
[30:30] Therefore, you shall devote yourself to the religion of strict monotheism. Such is the natural instinct placed into the people by GOD. Such creation of GOD will never change. This is the perfect religion, but most people do not know.

*30:30 Recognizing God ALONE as our Lord and Master is a natural instinct. We are born into this world with such an instinct. See 7:172-173 and Appendix 7.

Monotheism is the belief that there is only one God;
[59:24] He is the One GOD; the Creator, the Initiator, the Designer. To Him belong the most beautiful names. Glorifying Him is everything in the heavens and the earth. He is the Almighty, Most Wise.

Submission (Islam): Abraham's Religion*
[2:135] They said, "You have to be Jewish or Christian, to be guided." Say, "We follow the religion of Abraham―monotheism―he never was an idol worshiper."

*2:135 The Quran repeatedly informs us that Submission is the religion of Abraham (3:95, 4:125, 6:161, 22:78). Abraham received a practical "scripture," namely, all the duties and practices of Submission [the Contact Prayers (Salat), the obligatory charity (Zakat), the fasting of Ramadan, and the Hajj pilgrimage]. Muhammad was a follower of Abraham's religion, as we see in 16:123; he delivered this Final Testament, the Quran. The third messenger of Submission delivered the religion's proof of authenticity (see 3:81 and Appendices 1, 2, 24, & 26).

[3:95] Say, "GOD has proclaimed the truth: You shall follow Abraham's religion―monotheism. He never was an idolator."

Abraham: Original Messenger of Islam*
[4:125] Who is better guided in his religion than one who submits totally to GOD, leads a righteous life, according to the creed of Abraham: monotheism? GOD has chosen Abraham as a beloved friend.

*4:125 All messengers since Adam have preached one and the same religion. Abraham was the original messenger of the creed named "Islam" (22:78, Appendix 26). "Islam" is not a name, but rather a description meaning "Submission."

[6:161] Say, "My Lord has guided me in a straight path―the perfect religion of Abraham, monotheism. He never was an idol worshiper."

[10:105] I was commanded: "Keep yourself devoted to the religion of monotheism; you shall not practice idol worship.

It is not about the name of any religion!

Submission (Islam): Abraham's Religion*
[2:135] They said, "You have to be Jewish or Christian, to be guided." Say, "We follow the religion of Abraham―monotheism―he never was an idol worshiper."

*2:135 The Quran repeatedly informs us that Submission is the religion of Abraham (3:95, 4:125, 6:161, 22:78). Abraham received a practical "scripture," namely, all the duties and practices of Submission [the Contact Prayers (Salat), the obligatory charity (Zakat), the fasting of Ramadan, and the Hajj pilgrimage]. Muhammad was a follower of Abraham's religion, as we see in 16:123; he delivered this Final Testament, the Quran. The third messenger of Submission delivered the religion's proof of authenticity (see 3:81 and Appendices 1, 2, 24, & 26).

No Distinction Among God's Messengers
[2:136] Say, "We believe in GOD, and in what was sent down to us, and in what was sent down to Abraham, Ismail, Isaac, Jacob, and the Patriarchs; and in what was given to Moses and Jesus, and all the prophets from their Lord. We make no distinction among any of them. To Him alone we are submitters."

All Believers Are Redeemed, Regardless of the Name of Their Religion
[2:111] Some have said, "No one will enter Paradise except Jews or Christians!" Such is their wishful thinking. Say, "Show us your proof, if you are right."

*2:111-112 See 2:62 and 5:69.

Unity of All Submitters
[2:62] Surely, those who believe, those who are Jewish, the Christians, and the converts; anyone who (1) believes in GOD, and (2) believes in the Last Day, and (3) leads a righteous life, will receive their recompense from their Lord. They have nothing to fear, nor will they grieve.

Minimum Requirements For Salvation
[5:69] Surely, those who believe, those who are Jewish, the converts, and the Christians; any of them who (1) believe in GOD and (2) believe in the Last Day, and (3) lead a righteous life, have nothing to fear, nor will they grieve.