I, too, believe Jesus, while He lived on earth was fully human. But as you know, I believe that God had begotten His only Son as the first of His acts, and that the Son was fully divine (though not God or part of God), and that He divested Himself of His divine attributes when He became human.
Have this mind among yourselves, which is yours in Christ Jesus, who, though he was in the form of God, did not count equality with God a thing to be grasped, but emptied himself, by taking the form of a servant, being born in the likeness of men. And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross. (Philippians 2:5-8 ESV)
So Jesus, in being born, did not hold on to his divinity, but emptied Himself, and became fully human. But the fact is, though He allowed Satan to try to tempt Him, He also couldn’t be tempted in the sense of success on the tempter’s part.