Follow up to "did god create us...."?

i asked a question about whether or not God created us for the purpose of loving him. one of the replies gave a bible extract which confirms this. Now i am an atheist, and i do not enjoy seeing people needlessly following a book which tells them such things. If there is a God, why would he be so arrogant as to create a race of animals for the mere purpose of loving him, he then proceeds to kill them when he wants and produce m pain and killings. These creatures he has created all die and therefore there is no point in creating them. this God is then referred to as "All-loving" and "All powerful". At what stage does this make any sense. to anyone with half a brain they would created creatures which did not die and would not kill them, indeed, a being that is all powerful should be able to overcome the need to have something which loves him. Can any Christians or anyone explain this in proper terms.