"If God didn't exist, the ones who truly don't believe would likely act out much more on their beliefs no?" I don't need some fear based faith system keeping m

"If God didn't exist, the ones who truly don't believe would likely act out much more on their beliefs no?" I don't need some fear based faith system keeping me in check. Life is hard, difficult, and unfair enough as is without me adding hateful chaos to the mix. I do find it weird that people need the threat of a punishment in the hereafter to keep their baser instincts in check. I am highly suspicious of anyone who cannot seem to fathom that goodness or morality can be found in something outside of divinity. What may they be hiding under that coat of piety and how many rounds does it hold?