Astral, it's fine, don't worry about it
Try not to get discouraged. Who knows what the background story of that thread, or if it might've been related to Kill in some negative way? Or maybe he's just having a bad day. We all have them! Try not to get to flustered with other members. I can assure you if you stay high quality and post often, it will be a sand grain on the beach
Besides, if you do make a trade, most people read reputation and vouches. And if they see negative rep for digging out an old thread, they won't take it to heavily. Hope this might cool down some angered emotions