Okay, then please show me where Paul says that the Torah is a temporary schoolmaster for the messiah. I am unaware of any such statement by Paul, but I'd be pleased to hear what you have to say.
What Paul and the rest of the Church always held from the time of Jesus until today was and is that Jesus was precisely the Torah. They quite literally equal each other. JESUS = TORAH. Using simple substitution of equal terms, for Christians you're suggesting that "Paul taught that Jesus was a temporary schoolmaster for Jesus," which is obviously absurd.
If you don't understand that much, you obviously misunderstand fundamentally Christian basic doctrine. I repeat that you should first comprehend what traditional Christians actually believe before you start opining on the subject.
I am unaware of any chr*stian teaching that J*sus=Torah. I do know that chr*stians believe that J*sus=the Logos.
Other than this, I'm sorry I can't satisfy you.