Jango was annoyed. He and his son had been thrown backward through time through a freak reaction of his seismic charges, a Jedi and an unknown Jedi artifact hidden in the asteroid belt near Geonosis. He had had to team up with that Jedi to try and find a way home, but said Jedi decided to scarper off to Naboo to try and save someone named Qui-Gon Jinn.
Another fraking Jedi Master.
Well, that ended up mission accomplished, with a very dead Sith (courtesy of Boba and a sniper rifle – Jango was very proud), a saved Jedi Master, two versions of the original Jedi, and a little boy who Jango was this close to adopting, because he certainly wasn't going to leave him with the Jedi (and he might have to take the younger Kenobi too, that poor child was a mess.)
Now Jinn was trying to convince him to give up the name of his employer, "So we can stop the tragedy before it happens," and just didn't understand why Jango wouldn't budge.
Finally, with a pointed look at Boba, Jango Fett looked Qui-Gon Jinn squarely in the eyes, and declared:
"You've obviously never been a parent."
End noted:I should note, I think Qui-Gon Jinn would be a fantastic teacher, but should have never been allowed to raise a Padawan.