I see the JD thing this way:
I enjoyed JD a lot in the beginning of the idol season. Then, just as Adam observed, he went off the rails a bit. JD felt stung by Adam's opinion, Adam said "oops, sorry," and then JD shared opinions about Adam's cd choices.
THEN, out of the blue, JD reached out to Adam, albeit awkwardly, because I think he realized he really did want some of Adam's input (I think he realized Adam had not been criticizing him personally, that Adam's "been there" with the idol experience, and that he's overall honest and nice - who wouldn't want Adam's help?). JD took a shot.
Adam responded, it seemed to me, in bemused but not rude fashion.
For whatever reason, JD seems a bit like a bull in the china shoppe of life (whereas Adam is the opposite), but he's not hateful. He's never questioned Adam's talent. I'm not defending JD, I'm thinking about why I don't feel negatively toward him.
And I would bet money Adam tweeted about the movie becuase he saw the movie not to send a secret message that he was mocking JD. I don't think he was, nor that he has any need to.
JD's got fans. He has some talent. It takes a certain bravery to choose a career all about being in the public eye despite having involuntary facial tics and guttural hic-cups. I hope he finds a way to have a career doing what he loves.
