Yes, it felt to me like that as well... The way he asked disappointed me, too. Mr. Kaplan is a criminal as well, why make the big deal out of it. Yeah, she was close to Red but she at least was a criminal that betrayed him. And Aram had seen Red...
Although most of them don't know what we know. We know that he values loyalty most and I guess it's not far fetched to assume that he was really betrayed in the past. So I see where he was coming from and why he simply couldn't do anything else.