So many words, did you refute a single point that I made? Jesus had a dual nature, God in spirit and man in his flesh. I never said Jesus was not fully human in his flesh. This is exactly what Heb 2:14 says:
14 Since the children have flesh and blood, he too shared in their humanity so that by his death he might break the power of him who holds the power of death—that is, the devil—
As to what "human nature" is, as opposed to a spiritual nature, it is not something with a good common understanding. That is why I used sinful nature and defined it. As to the philosophical debate of which directs our actions more, our flesh or our spirit; it depends on where each places his importance. You seem to think the flesh/human nature to be the dominate source that guides our choices. I think the spirit to be dominate.
As to your thoughts on temptation, you should be careful to develop a doctrine on two verses of James. Further note James 1:13 says God can not even be tempted by evil. Do you think Jesus was not God? Take scripture in context and read it together with what the rest of scripture says. James 1 is not a doctrinal essay on the mechanics of temptation. It merely speaks of the process of how people fall into sin. It says evil desires lead to sin. Jesus said evil thoughts are just as much sin. So much for your argument that Jesus had the same evil desires that we have, only he did not act on them, therefore he was never guilty of sinning.
Look to the bulk of other scripture to learn that sin requires a temptation and since God does not tempt, Satan fills that job. Look to Genesis 3:6 to see that Eve did not even desire the fruit of the tree of knowledge until Satan deceived her. Look to the temptations of Jesus explicitly listed in scripture as being done by Satan himself. Look to the angels in heaven, they do not sin anymore. Maybe because Satan was thrown out of heaven at the fall. Look to the next age where there will be no sin, maybe because Satan will be in the lake of burning sulfur.
Your idea that temptation requires an evil desire doesn't fit very well with two of the three temptations explicitly listed for Jesus. First temptation, I give you that after fasting for 40 days, Jesus' humanity/flesh was hungry. To say that he had an evil desire to feed himself, I don't think so. Temptation two, Jesus had an evil desire to throw himself down to the ground, NOT. Temptation three, Jesus had an evil desire to rule the world, NOT, besides God already gave that to him.
As to your quote of Hebrews 4:15 and thinking that Jesus was tempted like us in every way, Not. I don't think Jesus had gay desires and was tempted to sodomy, so I think your literal interpretation needs an adjustment.
Since you take to such a legalistic reading of these words, I will test you. Did Jesus redeem women? He certainly did not assume to be a woman. So where do you draw the line when talking about Jesus' nature, being both God and man? You seem to dismiss his being God along with his spiritual nature. Understand that we all are the joining of flesh and spirit. How much our decisions are based on our heart, mind and soul is a mind game. How much Jesus was like us being driven by desires of the flesh vs. desires of the spirit is also a mind game. It is not even important to the concept that God sent his Son to die for us and redeem us. Is there even some law that said God had to come as a human to redeem us? No, scripture says he did this so that we know his compassion is true.