Dawood Bhai, you wrote
"You think when the verses of salat were revealed to the exalted prophet, he did not know what it is? People around him did not know what it is? He, prophet did not perform Salat, people did not do it behind him…"
So you wrote that the Messenger knew what salat was and did a physical prostration because of this meaning.
I wrote that he had no knowledge from Allah to him in the Quran for him to perform a physical namaz, neither did the Quran confirm the physical acts ofl namaz when it says Abraham did salat, so we are left with zero instructions on both counts.
Where did he get the physical acts? Only from his ancestors and we cannot prove what they did was correct because the Quran does not confirm this.
Quran says speak to people in salat in a moderate tone, do speakers turn their backs to their audience so that they were behind him?