Blaming the Spanish, in general, for the deeds of the Conquistidores is not only wrong, it's an insult to the Conquistidores. They did their own stuff and with little guidance from Madrid.
I think any of them would be willing to own up to his own deeds.
Wait, was it your relative who was thrown to the dogs, or was it Pizarro ?
Oops. Long dead thread, sorry.