You replied to his post saying it was just a boss that you needed fire resist for, when it was arcane damage being done. You tried to act informed, and made a fool of yourself in the process.
Furthermore, the explosion(not blast) happened fairly constantly, this is why melee did not get much chance to do any damage, hell my role back then as a warrior was to bandage people because this was back when healer mana actually mattered and I'd just be a mana sponge if I tried to dps. What little melee damage there was was borderline negligible, that danger lied in people being stupid when a blink happened and getting aggro, this would lead to healers getting exploded and a rapidly spiraling cycle of deaths.
Just stop trying to take the conversation off on pointless tangents because you think you know more than the other guy, someone will step in and prove you to be wrong.