I certainly understand what you were trying to do with Urshak, doghead... and I knew that something was going to come out of it at some point. I had no problem with that whatsoever, and fully expected to deal with that problem when it came up. So that plotline is all good. I just thought we'd get to at least start our plotline before it got destroyed.
I guess my real frustration was/is with the fact that the opposing grell showed up exactly when we made first contact with the gnolls, thereby making any/all of our intentions suspect or moot. That's what I meant by being "outplotted" by the NPCs. We show up with friendly intentions, have barely a chance to begin talking, then all of a sudden opposing grell show up and attack, thereby making our group look like liars. I know if I was the gnolls, I wouldn't ever believe that our small party of grell ever had honest intentions and would instead think this was one giant set-up. And now that things are devolving into one giant grell vs gnoll fight, it seems that it is backing those thoughts up. Mogro now has to choose between defending a group of gnolls he's barely spoken to (and who, quite honestly, still might be the vicious killers everyone else believes gnolls to be, but he's not had a chance to discover for himself)... or joining his townsfolk brethren in attacking these gnolls and going against every reason he came out here in the first place.
Had we had a couple hours of dealing with the gnolls, establishing a rapport, coming to some understandings about each other (especially about how many of our townsfolk are not as willing to talk as we were)... and then the other grell showed up to attack, then that would've been cool. The gnolls would know we weren't in on it, and thus Mogro would have been able to make a knowledgeable decision on who to defend/attack. But right now as I said... it's all up in the air. I'm not willing to have Mogro attack the gnolls because it goes against everything he came out here for... but I'm also not willing to attack the other grell because for all we know they are in the right, plus the fact it would basically ostracize us all from the krel when the other townsfolk found out we killed our own people to defend a bunch of gnolls we barely spoke to. It's a no-win situation... which is why Mogro's staying out of it.
Right now... the only thing Mogro wants to do is to go back to town and tell everyone there "hey, just thought you might want to know... those of us you sent out to speak with the gnolls did in fact meet them and spoke to them for about five minutes... they seemed okay for the moment and said they wanted to trade... but then a bunch of other townsfolk showed up and attacked and pretty much destroyed any chance of negotiation from happening, so it seems we're now at war with a gnoll band for no good reason. We'll see how many our our brethren come back, and you town elders can decide what to do next."