Brother Dawood, very cleverly you deflected my questions by asking counter questions. But your counter questions makes it very clear that you believe that
Islam is just not confined to Quran rather it includes some historical practices also, although you may not acknowledge this explicitly.
My answers to your question are as follows:
1. No Islam is not a new religion. It was given to Prophet Ibrahim (S) and other Prophets also. I believe in this because it is very clearly mentioned in Quran, not because of any other source.
2. Quran is neither uprooting nor most certainly “merely reforming” any connection with past and thereby reducing itself to mere amendment to previous scriptures.
Quran is “Furqan” against which all the matters related to Deen of Allah will be tested and decided. All the commands, instructions, values are completely anchored in Quran itself and does not depend upon any other outside source. Only and only Quran is given guarantee of protection by God, therefore no other book or any practice howsoever old and howsoever broadly practiced can be raised to the level of Quran in terms of certitude.
Brother Dawood, yes you didn’t used the “Tawatur” word in your posts but it is implied in all of your posts where you are justifying that there was a continuity of many practices from the time Prophet Ibrahim (S) and Prophet Mohammad (S).
“Tawatur” which is defined as “unbroken chain of continuity”, in fact is nothing but “ancestral following” and regarding your question “where in Quran, the Tawatur is looked down upon?” you may refer to following few Ayats, among which first is most explicit and stern.
(QXP) 2:170 When it is said to them, 'Follow what God has revealed', they say, 'Nay! We will follow the ways of our ancestors.' What! Even though their ancestors (and the ancient Imams)
were lacking in understanding and were not rightly guided? …….
Few other verses are 6:148, 21:52-54 and 43:24.
By the grace of God I have already found my answer in His Book, despite my limited knowledge.