As others have said have a small listen to some of Richard Dawkins for some clear and rather valid points, but the gist of it is:
1) Religion "explains" the inexplicable with more inexplicable
2) Religious values are typically about smiting those who do not believe in God or follows typical norms.
3) Many of the religious book stories are in the most rather horrid and inhumane.
The good in these texts is few and far in between and are pretty much good human morality which you do not need to read a 2000+ year old book to learn of.
Atheism is a horrid word, it sounds like a cult or a religion in itself. But simply put I base my opinion on fact, on the facts and progress we have made over the last few hundred years which have given us vast amounts of knowledge, technology and other wondrous things of which religion has played no part at all apart from slowing progress down.
Religion has slowed progress, caused and still causes much pain to this day across the world. Some type more so than others typically in the Middle-Eastern countries, luckily modern Christianity is quite harmless however it doesn't make the whole idea any less wrong.
I wouldn't describe myself as an Atheist however I do not follow the disgusting cult that religion is, the sooner these ancient and dangerous organisations leave us alone the more the human race will proper in general.
Going back to the OP question, honestly this is a difficult one. I would quite clearly lay down my views with valid reasoning and back it with evidence. Then ask him to do the same with his new religious believes and at least give him a grounding to make a more informed choice. Hopefully you may be able to snap him to his senses.
1) Religion "explains" the inexplicable with more inexplicable
2) Religious values are typically about smiting those who do not believe in God or follows typical norms.
3) Many of the religious book stories are in the most rather horrid and inhumane.
The good in these texts is few and far in between and are pretty much good human morality which you do not need to read a 2000+ year old book to learn of.
Atheism is a horrid word, it sounds like a cult or a religion in itself. But simply put I base my opinion on fact, on the facts and progress we have made over the last few hundred years which have given us vast amounts of knowledge, technology and other wondrous things of which religion has played no part at all apart from slowing progress down.
Religion has slowed progress, caused and still causes much pain to this day across the world. Some type more so than others typically in the Middle-Eastern countries, luckily modern Christianity is quite harmless however it doesn't make the whole idea any less wrong.
I wouldn't describe myself as an Atheist however I do not follow the disgusting cult that religion is, the sooner these ancient and dangerous organisations leave us alone the more the human race will proper in general.
Going back to the OP question, honestly this is a difficult one. I would quite clearly lay down my views with valid reasoning and back it with evidence. Then ask him to do the same with his new religious believes and at least give him a grounding to make a more informed choice. Hopefully you may be able to snap him to his senses.