Razi bhai, I did not talk about Tawatur at all in my posts. I am just asking you please tell me where in Quran, the Tawatur is looked down upon? I just ask you this: Is Hajj new for Muslims or was it practiced before Quran? Did they know what Hajj is before Quran?
With regard to your hypothetical question:
1. Is Islam a new religion or was it given to Ibrahim as well?
2. Is Quran uprooting any connection with the past or merely reforming it?
Answer these questions and you will get the answers you are looking for.