You mean we believe the Bible is a testimony from God to us?
I'll tell you what, you believe what you believe and I'll know what I know. :)
The temptation of Jesus was a charade if He did not have the potential, in His human nature, to succumb just as it would be a charade if He, in His human nature, did not possess the free will to resist. He made the choice that Adam didn't. If He resisted because of His divine nature, then He was not fully human, and His temptation was a charade.
I suppose you have to say that since your side thinks that man has to use his inner goodness, apart from God, to make his own decisions. I suppose you have Jesus apart from God for the same reasons. Jesus was only ever "apart" from God once, and it wasn't during the temptation.
His two natures are neither fused nor confused. They are separate and distict and unconfused in one Person, one eternal and divine, without the beginning, and the other human, with a beginning. At no time were they one and the same.