Sorry ..... are you saying you feel empathy for Nagini ....

Voldermorts pet?
The keeper and witness of dark magic and secrets?
The informer that sent a poor caretaker to his death?
Assailant of brave Mr Weasley in the Department of Mysteries?
Muderer of Severus Snape?

And let's not forget the Basilisk would have killed Harry Potter ...to wit ...summoning the end of all of our stories!

Those snakes got what they deserved.