That Was Rude

Going by the comment, it is evident that Redditor "mattcuz83" was referring to American nuclear attack on Japanese cities, Hiroshima and Nagasaki. Well, that was indeed a vile comment, but given the fact "/R/RoastMe" is full of such spiteful responses, it wasn't a surprise. On a scale of 1 to 10, this "roast" deserves anything over nine in terms of its offensiveness.