DJ is just young, and it shows in the way he mouths off on social media.
Obviously, this may not be basketball related at all...but if it's not, it's still a very nebulous thing to say 5 days before the draft.
By all accounts, he has bought into the Spurs way and wants to be with the team, but that doesn't make him untouchable. That should be the expectation for every player.
He needs to realize that he is not a Tim Duncan, or even a Manu Ginobili or Tony Parker. His name WILL get involved in trade talks, even if the FO is just exploring options.
If he starts taking that personally and making it a chip on his shoulder, it's going to be a tough career for him.