Thanks for your comments. I agree that unpacking and understanding gender-based violence, or violence of any kind is a complicated exercise. This Blog was merely reporting on some discussions that took place recently that explored a few of the aspects of this issue. Other work at the Bank and elsewhere is, of course addressing these issues in much greater depth.
On the issue of patriarchy, I'm not sure using a broad term like that is helpful. First, the meaning of that term itself needs to be unpacked, it might mean different things in different contexts, it does not explain violence across contexts, and as you say yourself, violence takes many forms - including within genders. I would be very interested in understanding what you mean a "culture of patriarchy" and where you think this exists and where not.