Something very interesting about the definition of the word "Muslim" in the Quran

While re-reading the chapter "The House of Imran" I came across a verse which I had previously not taken careful notice of! Reading the verse which I shall put up after this intro. it seems to me that the verse is implying that the Lord has always meant ONLY ONE religion to guide his people and had in fact no intention of the people of the world to differ concerning their religious outlooks or to be divided into Jews, Christians, Muslims...... The verse appears to be saying that ALL good Jews and Christians and Muslims should be considered as ONE entity and also points to the fact that Abraham the prophet considered himself a Muslim ( here by Muslim the book is referring to someone who is after the truth and one who acts in the best possible way towards his Lord.)

Looking at the verse itself might be more helpful:

Who are Muslims?

*Say: "We believe in God and what has been sent down to us, and what was sent down to Abraham, Ishmael, Issac, Jacob and their descendants, and what was given Moses, Jesus and the prophets by their Lord. We do not differentiate between any one of them, and we are committed to [live at] peace with Him."
[House of Imran. Verse 84]

I was immensely amazed after reading this verse and thinking how utterly joyful a world we might have had, had there not been all these different denominations which would quarrel in some aspects while in fact having great similarities amongst them.

Hope to see your thoughtful ideas and comments!