just remember Abraham assholishness was a product of the 'morality' of his society. If he were perfect he would have trusted God but he wasn't and these character flaws show us that we do not have to be perfect in order to be greatly used by God to accomplish world changing things.
Remember without god Abraham would have been murdered for his wife and she taken as a sex slave. Yes god saved them and awarded him by having the kings of the regions pay a high bounty for doing nothing, but at the same time do you really think the bounty would have been so high if they would not have plotted and killed abraham?
Remember without god Abraham would have been murdered for his wife and she taken as a sex slave. Yes god saved them and awarded him by having the kings of the regions pay a high bounty for doing nothing, but at the same time do you really think the bounty would have been so high if they would not have plotted and killed abraham?