A question for all of the religious people out there.?

I'm sorta religious, but there is this one problem I've always had with the Bible, can somebody explain it to me? God is supposed to be perfect, meaning whenever he makes a decision, it is the right decision, and if he is perfect his mind shouldn't be clouded by such human setbacks as jealousy and hatred. However, the Bible clearly states "Your God is a jealous one" then later puts jealousy down as one of the seven sins. This looks to me like the Bible is contradicting itself. Humans are imperfect. Humans are clouded by emotion. God is perfect. God is jealous. Can someone explain this paradox to me?