This is a very controversial event. It's used to defend Calvinism. This is a very very long discussion.
Are you avoiding the question? By all means, grace us with your apologetics of the god that made that man blind from birth. Because either "god did it" (for a number of possible reasons claimed by theistic apologetics) and then god is a moral monster; or then god didn't do it but is powerless or indifferent to stop it and then, why is he a god that merits worshipping?
It's not sinS and not all ancestors.
It's a very specific sin regarding the human nature itself committed only by the first souled human couple in a very specific situation (somewhere in Mesopotamia about 6.000 years ago).
It doesn't matter who committed that sin. Making others pay for it goes against basic justice and decency. Makes god a moral monster, not to mention an assassin.
Even those who didn't vote (or agree with) in the leaders must face the consequences too.
Not a good analogy. The god of the Bible made it entirely impossible for someone to escape suffering and death in the physical domain, the only one we can universally verify that exists. While many people find themselves trapped by political situations, they can always attempt to escape and some do it successfully, so it's not an inevitability.
I swear, the more I read theist apologetics, the more inclined I am towards atheism. If nothing else, just by sheer disgust.