Dear brother Mubashir,
Your interpretation of 16:123 reveals many things about you as a student of the Qur’an.
Firstly you do not apply logic to what you read in the Qur’an. For example, how do you conclude in 16:123 that because Abraham was not a polytheist he was monotheist? Because at that time, after rejecting the gods of his father, Abraham did not have any firm idea who was God. It was only after God “showed him the powers and the laws of the heavens and the earth” (6:75) that he came to know that God was Designer and Creator of our universe but even then he had no way to know that God had no partners, Sons and daughters until God told him so like He told Prophet Muhammad (s) in the Qur’an outside of the verses that explain the powers and the laws of His creations.
Therefore secondly, if you did conclude that 16:123 states Abraham was monotheist then you did not give that interpretation a thought. You just followed it blindly. And thirdly, when you read Qur’an without logic and follow blindly, it does not make you a good student of Qur’an.
Hence, Dawood is right. It would be just futile answering your questions on salaat.
AK Sayed (South Africa).
P/S: please note my laptop is still giving problem and if I don’t answer any more questions don’t think I’m being rude.