Once it became the dominant religion of the Roman Empire, about 100 years later the Roman Empire collapsed and became a backward society. The dark ages had begun...
As for only mentioning the old testament, most Sunday school and Bible classes teach the old testament. The Book of revelations in the new testament is just fear-mongering. It is a psychology to influence simple-minded.
Something that surprises Christians is that Christianity only existed after Jesus, so how could people be Christians before Jesus? (DUH).
To assume that believing a Kids book is the basis of an afterlife is nonsense. Even Jesus confirms this in the parable of the Good Samaritan which contradicts the Church teachings about following biblical teachings to get an afterlife. So someone that is a really good person from another religion does not go to heaven, but some Christian hypocrite gets into heaven just because they subscribe to Christianity. Absolute nonsense...
But hey if you value your afterlife insurance policy- at least it makes you feel better having more chances of getting into heaven just because you say you are Christian...
If Christians job is to convert people to religion, then an anti-theist job is to convert people away from Christianity. When I read the conspiracy theory nonsense from the likes of Beeno and the other ardent Christians- that confirms to me this is fake, manipulation and a pack of lies.
They all want to believe Bill Gates is a mass murder, or Soros is the devil etc. These are all made up stories by the Bible bashers to help reinforce their reality. It is all simple mind tricks and manipulative nonsense. Self-delusion... Sycophantic actions to increase chances of getting into heaven - something that they themselves doubt is true.