Altenweg,
Everyone is off topic.. don't worry about it.
Yeah I know, people always want to question God it is part of our nature. God can't go back on his Word and Abraham understood that. God had already made a promise that he would make Isaac a great nation. If he would have killed Isaac, this couldn't have happened. There are lots of reasons God put this in his Word. One of them is that it is a perfect picture of God sacrificing HIS OWN son for us.