God created man with a Free will. He gave men the gift of life and the means with which to sustain it for a time on Earth.
The idea that he created sin is bogus. He no more created sin than the person that becomes a father does when he creates a kid, knowing full well the kid will sin. He created the life and gave the person Freedom. god even came to teach, just as any parent does. Each person is responsible for their own acts. The responsibility, or guilt for sin never extends beyond the individual that sins. That's what God holds. See Ezekiel 18 and John 9.
uh, would a father sire a kid knowing he would grow up to be the BTK killer? God did.
Oh, come on. Your analogy is absolutely bogus.
The way an omnimax god can create a human is completely different from the way humans make another human being (I assume here you meant the old fashioned way). Additionally an omnimax deity knows the future in every little detail, whereas we do not.
So let's change the analogy a bit: this "father" doesn't make his kid the old fashioned way (with the help of a woman) but he assembles him atom by atom, molecule by molecule because he's a man with extraordinary capabilities.
Now, not only can this guy make a child from scratch, he also knows every little detail about the future of this kid, i.e. he knows the consequences of every change he makes to the design.
For instance he can see that changing certain parameters will make his son decline a friends offer to take cocaine whereas tweaking other parameters will change his future in such a way that he never meets this person.
So let's further assume that this father sees how the current makeup of his son will have the consequence of him shooting his family when he's 38 years 8 months and 11 days old but nevertheless decides to not make any further changes.
Now is the death of these people the father's fault (who could have made some more changes to his son's design) or is it the fault of the son?