To start with, I hope I am not resurrecting this topic from Elysium however I feel I should add a few words.
I am apologetic for saying this however I feel that this is exactly the sort of topic that gives the romans a bad press so to speak. I believe you are completely ignoring the context of the era, and, in my opinion, taking that unforgivable view of looking from the modern era back. It is extremely important in these issues to think from the perspective of a roman rather than a modern person. For example, the romans would have considered Commodus, Nero, Caligula etc atrocious people (see their sticky ends) however to them crucifying dogs is a tradition akin to bullfighting.
Regards
Marcellus