Actually Tammy's response is a similar one I was going to raise:
My father uses this argument - the OT is for a large part the Israelites misrepresenting god on many occasions - and putting their own spin on things (perhaps attributing him to bad things that they did?). Basically, most things that are immoral in the OT are mans fault (even though they attribute it to god) and everything good is gods fault.
But when jesus comes into the picture its all gravy.
What kind of argument can I make against such a cop out of an argument? (bear in mind I can't just point out how ridiculous that line of reasoning is - as it is a religious fundementalist we're talking about)
Any help?