What a crock of *insert appropriate word here*!
Not surprisingly, to me at any rate, as an extension to this I don't believe in original sin. It just doesn't make any sense to me. Sure, folks sin but they shouldn't be blamed for the sins of others just because of some distant familial line. If I'm not mistaken, the whole original sin package stems from either Adam & Eve (snacking on the fruit of knowledge) or Cain killing Abel (nothing like a little sibling rivalry).
Either way, their sins were their sins. No one elses.
However, people do sin; it's a thing! There does seem to be some waywardness in what is and isn't a sin depending on a person's belief system. However, let's keep this fairly simple.
What are your sins? Yeah, you...the person reading this. If you're so gung ho on everybody sinning then you must have some idea what your own sins are.
Care to share with the class?