Please present positive arguments why you think atheism is true

[Cinjin]

what objective responsability do you have, if God does not exist ?

Why would I need it? All each of us needs is personal responsibility ... and millions of non-believers have proven that they have it in spades.

If God does not exist, good and evil cannot exist.

Says who? You? "Good and Evil" are just words we use to define actions we like and/or don't like. We assign rape and murder the word Evil because we do not want these things done to us. Your god has nothing to do with the actions of man. Long before your silly religion existed and your sadistic god had been dreamed up, the human race was well aware of good and evil and the consequences that come with negative actions.

Everything is relative, and you set your morals, according to your preferences. There is nobody that can say, you are wrong and right. If Hitler thought, he was right in doing, what he did, who can tell him, that is not true, he was wrong ?

Ok now pay attention, cause this is the big one that you people are always missing out on.
You would totally have a valid point about our morals being useless because they are subjective if it weren't for one massive glaring thing ...
The morals of Christians are absolutely no better than anyone elses ... making your whole point mute. When your priests stop molesting children, when your preachers stop getting arrested for embezzlement, when your missionaries stop raping the natives, when your parishioners stop cheating on their wives, beating their kids, and stealing from their neighbors you can talk to me about the problems with our subjective morality. Telling the world that we should fear our own moral code when there is no god telling us what right and wrong is - is just insulting. Especially when you consider the atrocities that come from the hands of Christians everywhere!

And by the way Hitler WAS a Christian and what good did his god-given "objective" morals do the world?? Well, if you're anti-Semitic, than Hitler did a great good didn't he? But yeah, for the rest of us, your god-given morals didn't do a damn thing! None!

This button, issued to thousands of German soldiers' uniforms
is translated, God With Us. Until you can figure out how to get Christians to actually HAVE some universal morality I suggest you STFU about your "objective morality."
Or at least go read a news report or a god damn history book!