I wasn't there when they "roleplayed", just got there a few seconds later.
But: It could have been nice, if we heard something about your intentions, and what your group is actually about, before you attack a convoy of 6 official Rogues.
/edit: As said, I wasn't there when the engagement started. But I doubt, that the Rogue side started the fire.
(Besides: Your group wasn't collecting bounties? And you all had Freelancer ID's?)