No, Jesus' flesh was not sinful...His temptations had to do with unsinful aspects of His humanity.
God cannot be tempted
with evil...
There is (John 5:24 (kjv)).
Jhn 5:24, Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.
Or you can call on the name of the Lord (God) and be saved (Romans 10:13)...
This name is clearly given in Acts of the Apostles 4:10-12.
No; and by your estimation you have just committed the unpardonable sin (but you haven't...).
Forgiveness only comes through faith in the blood of Jesus (Romans 5:9, Romans 5:1, Romans 3:25, 1 John 1:7-9).
Jesus lived a perfect life and then died to take the penalty for our sins; now His perfect righteousness is applied to the account of the one who believeth in Him and what He did for him or her on the Cross.
This is the gospel...but I fear that I may be casting my pearls before swine here.