A moral and ethical question for theists

[dyresand]

But how do you determine that one part is real while other parts aren't?!? Is it just acceptance of what's spoon fed to you or is there some actual process?

The stories in the OT sound very bizarre to me, and were written thousands of years ago when writing style could very possibly be different. So it would make sense to believe they are not historically accurate. Especially the story of Genesis, of which there is evidence that proves it's impossible it could have happened literally as it is written.

But then again, like christians and catholics.. they magically forget what is stated in the bible and what jesus says about the OT.
You are really supposed to still follow it. 

When the OT was written 6th century B.C
When the NT was written first century A.D.

The problem with saying the jesus story happened and believing it to be true, the problem is that anything written about jesus here all hearsay as there 
is no proof. If a person named jesus existed he would have been a con man and a heretic and gotten killed. Also most of the things jesus was preaching
was just common sense anyways.