"Couple things: A. I didn't know it was sacred. B. I didn't pick the fight. And C. My very existence is an abomination against my own world, so I don't really care if my presence was unwelcome in your memory. I'm used to it and have been for a few thousand years."

But, there is something to be said about the other part.

"But I am sorry that my ignorance got your friend killed."

Because even if it hadn't actually happened, the emotions are still real.