She truly belives what she is doing is right,thats why shes willing to do all thopse terrible things.Looking at it from her side,Siruis /Nevill's parents were the enemy/she was the"hero".
i could sai more,but im lazy.I was the original genius of this thread idea go
www.hpforums.com/forum/
and to characters/you'll see a thread called why the crap do you all hate Bellatrix
Its funny,because there people were more willing to be open minded,you guys could learn alot from those posts about judging villans,i suggest going there/PM me about how you felt about it,id like to know every1s opinion..BUT PLEASE TALK A LOOK!Its really extensive/I put a better argument there