Well, from what I heard from my side, my guys didn't know you were repping but you still shot at them from right next to the battleship while they were sitting 2k away. That's what I've been told.
Now the way I see it is both sides are at fault here. RHA standing orders are to viciously attack RM in Dresden due to ideological value of the system. That's not really going to change. You should have told the Hessian bombers however that you were repping if you wanted to continue to do so, rather than run to the battleship and shoot at them from there without docking, which just made it look like you were trying to force them to leave system instead (which incidentally has been a popular strategy among indies lately, so kind of rightfully so my guys were annoyed). Cause if they cruise away then by server rules they have "died" which makes them unable to re-enter system for 4 hours. And that is kind of lame too.
On the flipside my guys were wrong to go OORP and I told them that, they are fully aware that they did it wrong too.
But next time if you're setting up, tell them that ingame before you get attacked and they should leave you be.