Oneness of God in Islam & Sikhism

What makes Islam and Sikhism so close is their belief in One God. In the Guru Granth Sahib Guru Nanak states:

There is one God,
Eternal Truth is His Name; Maker of all things,
Fearing nothing and at enmity with nothing, Timeless is His Image;
Not begotten, being of His own Being:
By the grace of the Guru, made known to men.

In the Quran, Surah Iqlas Chapter 112 is the states.

1. Say: He is Allah, the One!

2. Allah, the eternally Besought of all!

3. He begetteth not nor was begotten.

4. And there is none comparable unto Him.

With this belief, both Islam and Sikhism forbid idolatry. Now many Hindus may claim that they also believe in One God. The Hindus state One god means One God who is a number that can multiply itself and take a human or an animal form. This belief is not accepted in Islam. What the Hindus they fail to understand is that in Islam, when Muslims believe in One God, they do not believe in him being one here as is the number one. In Islam, the oneness of Allah is not a numerical one, because the numerical one can have numbers after it such as 2 and 3 or numbers before it such as 0 or minus 1. The oneness here is referred to Allah being a unique one. There is nothing like him.