INTPs and ENFPs arguing about agendas?
It happens so often too. And always leading in the same direction: to some place where the world is free from drama and there are proper ways to behave in public. It's almost like, *gasp*...
Or to put it another way, if you detect a hidden agenda, it's probably because there's introverted judgment behind the extroverted intuition. (And less than conscious extroverted judgment too.) And if you think you're not doing something absurd in developing your own position, then possibly the ENFPs are not doing something absurd either in developing theirs. But if you view with suspicion your own inner workings, then view theirs that way too.
Which cuts both ways, of course: if ENFPs are to be liberated from the oppression of too much propriety, INTPs are to be liberated from the distress of too much liberality. Muzzle both.