Sancta simplicitas...There might be another reason nobody has mentioned your ideas. (They might not be mainstream.)
And I'm going to have to disagree on a couple of points below
1. The incarnation was necessary to allow Jesus to live a perfect sinless life as an example to mankind...
No. It was not necessary.
That's the whole point of Grace.
God doesn't HAVE to do that. Why does God HAVE do something for our benefit?
2. The crucifixion was necessary to fulfill Jewish prophecy in the Tanakh (Psalm 22, to be precise) on the manner of death the Messiah would have. More detail can also be found in Isaiah 52 & 53 on his life and death.
No. It defeats the purpose of a 'prophecy' if you have to contrive to fulfill it.
A prophecy is a statement of what will inevitibly happen.
When Jesus says go to this place and there you will find a colt/foal on which nobody has ridden, He isnt staging an event.
He is just doing what was always going to take place.
The fact that Isaiah prophesied it doesn't compel Jesus.
And that is really all I have to say on this subject. Just couldn't stand reading all of these pages and not seeing the actual accepted reasoning for the incarnation and crucifixion.
Why didn't you mention Gods voluntary desire to do something loving which was entirely for our benefit?
You would believe just anything, wouldnt you?