In The Merchant of Venice, why does Jessica run away from Shylock and why does she take his money?

In Act II, Scene 3, we get an idea as to why Jessica is
going to leave her father and run off with Lorenzo.  She implies it is because he acts
in evil ways.  She'd rather run off and become a Christian than stay with her father who
does these things (presumably lending money at interest and being a Jew in
general).

I think she steals the money partly as a way to
get back at her father, partly as a way to prove her love for Lorenzo, and partly
because she's smart and it makes sense to have money when you run away from
home.