@Jonny, that's a very action-reaction-based OP and question, but I am so "over" that. What a shallow and incomplete picture you have of the subject.
Are some people motivated by fear or guilt? Most assuredly. And like many atheists and other non-believers, many Christians are motivated by ego, too. They want to be viewed as right and good. If ever found to be wrong, the ego becomes bruised.
God is all love -- infinitely abundant and unconditional.
Many non-believers will counter with something said in the Bible. The problem with non-believers and most Christians is that they are lazy literalists.
They don't know that truth is in the "spirit" of the word, not the "letter," for the "letter killeth" and the spirit "giveth life."
Why is religious spirituality with me not based upon fear? Because I have been outside of my body and seen the world without the need for human eyes. I know that I am an invulnerable, immortal child of God who happens to possess a temporary Homo sapiens body.
I have also seen the mechanics of creation. Genesis 1:26 lets us know that God created us in His image and likeness. What many who read this seem to forget is that God is not Homo sapiens. That makes us non-physical, spiritual and immortal sources of creation. That's why miracles are inherently easy for us, once we get past the barrier of ego.
Ego is the trap. Ego is the mistrust, fear, envy, pride, lust, gluttony and rage of this world. Ego is the darkness pulled over our spiritual eyes, because with ego we have chosen to depend upon physical instrumentalities, rather than our innate spiritual ability to see. When we entirely subdue ego through generosity, compassion and humility, we take off that blindfold and return to the Light of being able to see with our own spiritual eyes