From what I have seen, the villages that IFY took might have been war targets. If, as Sexy says, there was an agreement between sp.ag and OpenEye regarding the division of those targets, then IFY has no right to be breaking his duke's given word to take them. Period. You either uphold your duke's word or oyu cause your tribe problems. Dukes often have to make decisions that affect the well-being of the whole tribe and leave some members feeling irked, but that's inevitable.
Tribes with selfish players don't last long, because if they only care about themselves and not the goals of the tribe overall, they are not likely to participate in tribal ops or send support when asked. I don't know the whole truth behind what is happening here, but I do know that there is an agreement in place between sp.ag and OE about certain villages in a k their tribes share... and if these villages fall within WATCH's side of the bargain than Sexy is right to be angry.