Why do Atheists mock Christianity and not give a better alternative?

Here me out, Ive posted a few religious questions since ive joined yahoo and the answers i get from Atheists really mock Christianity and religion as a whole.. most answers or questions from atheists always try to undermine religion by saying things like: How can there be a God, wars are started by the words of God, if there is a God why would he let this and that happen anyway? My answer is as simple as: If there isn't a God then what chance do we have and what is there in atheism that can save us from what is happening. If God does not exist then you cant blame God for the climate of the world or the way in which the world is, you have to blame man.. Deep down Atheists blame religion for the climate of the world since the beginning of religious teachings.. But religions preach peace right? wrong! any religion that preaches anything other than peace is not a religion is it? it is a cult.., it is the work of evil in the form of religion, like a Wolf in Sheep's clothing, this is what Atheists fail to relies, any war conjured up in the form of religion is the work of those who are evil and want greed, riches and power. Next Atheists never blame other Atheists for starting wars, why i wonder, this seems absolutely ridiculous for as many wars prosumably started by real religions there must be a percentage of wars started by Atheists and if they are Atheists then for what reason did they start the war when they are supposedly beliefless, any man who starts a war and wants bloodshed can not be a man that believes in God, infact there must be many soldiers who are Atheists and if they are why are they fighting? if religous foke are the only ones capable of fighting for a belief then wars should not include Atheists but they are still there fighting, to sum it all up Atheists should not blame religion they should blame their fellow non believers because if a man purely believes in God the way he is meant to be believed in then there would be peace!..So next time dont blame wars on religion, blame wars on man and his evil ways..