Oh please... Will you read and understand your Bible before swallowing up wholesale any crap you pastor says?
If your whole family is killed by a man, would you hunt down and persecute not only that man, but his kids, grandkids, grand-grandkids, and so on down the ages? If not, why not? They had nothing whatsoever to do with the original crime, of course. It's that simple.
Do you realize this is acting in a better, more moral way than your eternally vindictive Gawd who condemned all to Hell because of Adam and Eve? He's in fact acting just like Greeks gods, among others (take Aeschylus' tale of Orestes, for instance). Multi-generational atonement of sins and crimes was quite common in the ancient world but we've somewhat improved in mercy since then, as the Old Testament shows.
Just read Ezekiel 18:20 : "The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him". Try to square that verse with Original Sin...
When he tried in The City of God, if I'm not mistaken, to justify Jesus' sacrifice by considering it atonement for Original Sin transmitted down the generations by boinking (yup, that's where the idea comes from!), it seems St. Augustines forgot to read his Bible.