The Christmas Wrestler (Genesis 32:22-32)

We can understand that Jacob is afraid to meet his brother Esau because Esau vowed to kill Jacob which is why Jacob left his home.  So, we can understand Jacob’s angst as he is about to meet his brother.  So, why would God take the time to wrestle with this poor guy rather than simply defeating Esau?  What does this wrestling teach Jacob?  What does this wrestling teach us?  What does this wrestling declare about Christmas?