It's true that they didn't exactly have a whole lot of time to go around and pick up information. Waking up in that rough way while getting attacked, then going around the place to try and help others, only to hear about Taiki's state and then quickly following him here to the train..

.. well, it sure made it hard to pick up on any information being spread. Tidus is a little ahead of even Inigo, really, since he had been so busy trying to find a way to take back control over the situation that Inigo hadn't even heard as much.

"I prayed in front of those gods," Inigo confesses to the other two. Shifting so Taiki can hug him a little bit more easily, if that gives the other boy comfort.

(He's leaving out some details about said praying, but ssh, they don't have to know, right.)

"I prayed to Naga, in case I might have been able to reach her, but it was one of the gods from this place that reached back to me instead. I could feel their presence with me, during those first few days."

There's an implication in there. One he doesn't quite say out loud, because he doesn't want to further worry Taiki with details of the attack, but he's pretty sure Tidus will pick up on it. Maybe that's why I was attacked. Because he received one of those blessings.