>> The only true interpretation is what Christ taught the Apostoles
So far, so good
>> and which was handed down from them.
Hold on! That statement is itself an INTERPRETATION — YOUR interpretation (that you use to justify your “infallible” pope).
Nope. Firstly, it's not just mine but that handed down by generations
Secondly, the facts are that the beliefs on the nature of Christ etc. are as handed down from Apostolic times, the celebration of the mass is as in Didache etc.