Sacrifice him on an altar of wrought obsidian that dark forces may feast on his erring flesh!!!
I don't mean to minimize but the human memory is not a perfect thing. I was engaged to be married to a woman, we had been together for five years by this point, and one day I looked her straight in the face...and forgot her name. This was a woman I'd known for six years, been dating for five, and been engaged to for four. For at least five minutes, I could not drag up her name.
I wouldn't take it as an insult. Our brains do strange things at times.
I am as direct as a T-Rex with 'roid rage and about as subtle. It isn't intended to cause upset, I just prefer to talk plain. There are plenty of other people here who do the nice, polite thing much better than I can. I'm what you'd call a "problem dinner guest."