ZD:
You wrote: “A mamzer is also punished for the sins of his parents too”
No he is not. Can you cite a source for this? I want the guilty to pay.
The posuk says (לא יומתו בנים על אבות (דברים כד טז
There are ways of HKB”H exacting consequences from children, as we read in last week’s parsha in the Aseres Hadibros, but that is G-d’s business, not ours.