yes I understand your perspective. I am surprised that you find it paradoxical. “Oneness” as I’m sure you know does not always mean solid, or solitary. A rock is a solitary form of oneness. It shares no parts. But there are composite forms of oneness, such as one cluster of grapes, an egg, which has three parts, the yoke the whites and the shell, one house with many floors. on and on…
This concept of composite-unity is understood in Deuteronomy 6:4, where the bible declares,
" Here O 'Israel, the Lord our God is “ONE.”
The Hebrew word for “one” there is in a composite unity, not solitary unity. This composite unity is veiled of it’s understanding in the old testament. Only in the New Testament can we see it clearly develop into three persons.
The book of Genesis has the same examples: God said, “Let US make man in OUR own image…” (Genesis 1:26) who was God talking to in the Genesis account?.. some say the angels, but the angels did not create.
“Let US go down there and confound their languages…” (Gen. 11:7) Again God is speaking to someone here in these instances but who? He is speaking to the triune members of the godhead.
When Isaiah the prophet was called, notice the plurality of God’s speech,
"I heard the voice of the Lord saying: "whom shall I send, and who will go for US? then I said, “here am I, send me!” Isaiah 6:8.
All of these passages speak of a composite unity of the one true God.
Why did Mohamed reject this concept? and on what bases?