>>17969855
>it's simply a tradition
"The Talmud (Berakhot 30a) instructs Jews outside the Land of Israel to face the Holy Land while praying; Jews residing in Israel should turn towards the city of Jerusalem; those living within Jerusalem should orient themselves towards the Temple Mount, and those next to the Temple Mount should turn towards the former site of the Holy of Holies.[6] The Shulchan Aruch (Code of Jewish Law) thus specifies that in synagogues, the Ark should be placed such that "worshipers may pray in the direction of the Holy Land and the place of the Sanctuary in Jerusalem".[7] When synagogues are erected, they are built to face Jerusalem.[4]"
"Two centuries later, Saint Basil the Great declared that one of the unwritten COMMANDMENTS of the Church was to pray facing east.[16]"
>If one knows the qiblah and faces away the prayer is invalid.
Yep and if you can't know the prayer is then very much valid as you have admitted. Meaning your original point fails.
>Also why did the Qiblah move to Mecca after it had been Jerusalem for all history?
Because God commanded it that way. Jersualem was our Qiblah too so then you are saying they were idolaters for praying like your prophets lmao. What is the problem with God abrogating certain practices? You yourself believe that about the old covenant and religious rites. Was it also "convenient" to change that only when Jesus came? Double standards as usual. Anyway I have to go now, I will respond after I come back