When you believe that God punishes us for our evil deeds, it indicates fear is there in your mind. It indicates, you start praying to God and tell him to forgive you whenever you think you have done something wrong. The thinking of punishment and pardon by God is a way of associating fear with worship. I have seen many corrupt people ardently worshipping God by thinking that their corrupt deeds will be forgiven by God if they worship more.
Is it really necessary to believe and worship? Suppose if a person doesn't believe in God and never worships will he die of God's severe punishment? When we start believing something it means we have not experienced it in our lives and what people are saying we tend to think its true. Earlier also, here in some forums, I have said rather than believing anything try to know what it is actually. People must have the quest for knowledge. Do good to people, never think of harming others in any way and be a seeker of truth. Then there will be no fear in your mind.
"Life is easier when you enjoy what you do"