Bad example - they took a life and are therefore being punished by losing their life in the world. Do you know how long forever is?
As for trusting God, He cannot exist in the form Christianity portrays him as it is contradictory. I cannot trust God - I have to look at what it says in the Bible to determine if He is trustworty. When it becomes obvious that the Bible itself is not trustworty, either God does not exist or he is not the way he is portrayed in the Bible.
Sin can make us unworthy of heaven - that is easy to understand. However, there is no way that sin can make us worthy of an infinite time in hell.
David you really think you know more about justice than God? You can choose to spend your eternity seperated from him and every blessing that flows from him but I hope you do not. But if you do it is your choice. I don't think defending my logic which is correct will help you. There are none so blind as those who refuse to see. I can only pray for you and hope someday you will get tired of your self imposed prison and will choose eternal life and joy through Jesus Christ our Lord who loved you enough to die for you.