..."The_original_sin_is_blame"....

Michael, perhaps you are referring to the myth account of the man blaming the woman and the woman blaming the serpent. 
That's there, true enough, but the 'first', or 'original, sin is considered the disobedience of God's command not to eat of the fruit of knowledge of good and evil. The old 'the devil made me do it' excuse. Or our 'my 'fallen' nature made me do it". Anything to avoid admitting responsibility.. "blame" someone else for it.