

That is not true. The first and second commandment together are monotheism.
- I am the Lord thy God
- Thou shalt have no other gods before me
The first one only specifies that “I” is your God, not specifically forbidding other Gods, and only the second one then forbids other Gods.
If the first one should be interpreted as “I am the Lord thy ONLY God”, then the second commandment would be redundant.
You asked for an explanation since you obviously didn’t understand the argument you were making.
I understand that it was rhetorical, since you thought you knew what you were talking about. But I thought, if you are already asking so nicely, maybe you’ll learn something from it.
Looks like not only do you not know what you are talking about, but you are also resistant to learning.