its pretty simple if the Atheists are right then we can pretty much just do whatever the hell we want and there is no consequences, if the believers, and also the bible (highest selling book of all time) is right, then we need to repent of our sins, or suffer Gods judgement.
if your a person that thinks religion causes wars and is full of pedophiles, then your right, but religions, like the catholic church and most of the other mainstream denominations, and reading the word of God are two different things.
Jesus didn't start any church called the seventh day Adventists, or Jehovah's witnesses, he came to earth to spread the good news about forgiveness of sins and bring people back to worshiping the one true God in their life, to stop worshipping idols, that have no power to help you.
if you turn on your Tv and hear Creflo O'Dollar, or Kenneth Copeland, asking for Money, i dont recall that in the bible either, to donate Money. Jesus wants you to be a good parent to your kids, and if your neighbor needs a hand you lend it, if someone hits you turn the other check, dont hit them back, Jesus is the way, the truth, and the life, he wants you to come to him for for salvation, healing, rest, and fulfillment.