The OP is whi--complaining about his friends/party/clan either being killed by B-Graders after flagging on them, or being in a two-way war with them and being killed.
That raid is out of level for the flagged attackers - it's level 30, and they'd get PZed. They just came down there to PvP, and since I saw purples rather then reds, I must assume they were either in a two-way war or the newbies fought back.