That is great Jawaid bhai that you can see the term “Millat Ibrahim” in the book. Next step is to find out what this term means linguistically, grammatically, and how Arabs, the first recipient of the book, understood and practiced it. I will respond to one of your comments due to shortage of time, will take up others later as we proceed.
You wrote: “Now the really crazy part, you did not show one verse in the Quran to prove that the creed of Abraham means circumcision.”
I did not bring “circumcision” in any of my discussion so far. Since you have brought it up as well as 2:170 to prove your point, let me deal with this. Let me first look at the verse 2:170 itself.
[2:170]: And when it is said to them, "Follow what Allah has revealed (Anzala)," they say, "Rather, we will follow that which we found our fathers doing." Even though their fathers understood nothing, nor were they guided?
It is obvious from the above verse that the addressees are going against the explicit revelations in the book. You know very well that all is permissible except what is explicitly forbidden in the Book. Now I ask you where is the verse explicitly forbidding circumcision? None, whatsoever. If it is not in the Book, how do you come up with the notion they are doing something wrong? On the other hand, there is overwhelming historical evidence suggesting it to be one of the Ibrahimic practices. As is clear from other verses that Muslims are required to follow the Creed of Ibrahim, thus, one can understand why Muslims are doing it. Thus, all your inferences in this respect are untenable?