An Honest Question

I have heard a great deal about victim blaming in the past few months. Honestly, it was a new concept to me.

The more I think about it though, I get more confused.

So I want to pose a simple question:

Man A heads into the bar district of his local city late on a Friday night. He finds a tall, muscular man wearing tattoos and piercings. He walks up to him and says "Hey, pussy. You look like a piece of shit, and I wouldn't fuck your mother with a AIDS-infested dick."
Man A is punched and kicked by the tall, muscular man until he is unconscious in the gutter. He is permenantly brain damaged for life, and undergoes 10 years of physical therapy to regain the ability to walk.

Man B is walking home from his office late on a Friday night. He is stopped by a tall, muscular man wearing tattoos and piercings. The tall, muscular man pokes his finger into Man B's chest and says "I don't like the color of your shirt!"
The tall, muscular man punches and kicks Man B until he is unconscious in the gutter. He is permanently brain damaged for life, and undergoes 10 years of physical therapy to regain the ability to walk.

Assuming that physical violence is never appropriate, other than in the case of self defense, is Man A or Man B more culpable for the injuries he sustained?