even if you were to bring all kinds of authoritative proof to the people of the book they still would not accept your qibla nor would you accept theirs nor would they accept each others. were you to follow their desires after all the knowledge that has come to you you would certainly have been one of the unjust.
ولئن أتيت الذين أوتوا الكتاب بكل آية ما تبعوا قبلتك وما أنت بتابع قبلتهم وما بعضهم بتابع قبلة بعض ولئن اتبعت أهواءهم من بعد ما جاءك من العلم إنك إذا لمن الظالمين