Geralt gave a nod. It was curt, full of nothing but concern, knit brows.

"I'm sorry. I'm sorry that the world is cruel and you had to bear witness to something like that. I'm sorry it's scarred into your mind. That won't happen here, I'm promising you that. As long as I'm here, there will never be any pyres lit. I won't let it happen."

There were lines to be drawn. Things that couldn't be overlooked. He was angry for Nina's sake, and he was simply angry that such things seemed always to happen wherever humans were.