Emotions do present a problem if you read The Bible. If you can make God sad or angry, you essentially display some power over him (even if he does fry you in the end). For instance, I know what buttons to push to make my wife angry and if we’re in an argument and I want to escalate (and if I’m stupid enough to do it) I can say certain things that will hurt her. The same seems to be true of God throughout the Bible and therefore how can God be all powerful if he can be hurt? In other words, he has a secret weakness–emotions.
God is also referred to often as a “jealous God.” It comes off as petty because you can’t force someone to love you, but that’s exactly what God does. Worship another God or depiction of a god and you’ll find yourself swalowed up by the ground. In the New Testament this jealous vindictiveness isn’t so swift–you wait until you die and then suffer eternally in hell.
If you want to believe in God, don’t base it on a book written over time by men. It’s just too obvious through studying that book (and I would guess The Koran as well) that they represent human emotions and desires, and therefore the god being written about is an amplification of imperfect mortals.