@neologist,
You should watch that vid, it's very funny.
Quote:wouldn't you expect one claiming to be God's firstborn son to have that power?
Where did Jesus claim to be God's firstborn? He just talked to God affectionately, using the term "father" as lot's of people do.
Jesus was indeed accused of practicing sorcery by some, and believed to be a great magician by others. So were Peter and others, after Jesus' death. Even Simon Magus wanted to learn their tricks.
But you are right in a sense: in the Jewish mystical tradition, which continued into the Kabbalah and Zohar, somebody inspired or anointed by God was expected to be able to do miracles, which functioned as proofs of such connection with God.