That's my Boy
He is cute, mean, dangerous, obnoxious and little.
Detective PikaBat and Robin
http://evinist.tumblr.com
Even if his relationship with his mum isn't great - im pretty sure Damian would be very very unhappy that she was killed.
I imagine his league of assassins upbringing would mean he would be quite traditional and like many places in the past would view an attack on a family member even an estranged one as a personal front.
Talia is a narcissist. Why wouldn’t she think he’d avenge her.