There's a divine form that Jason could talk about that might make that clearer, even though any time a mortal or demigod saw them it was just a part of them and thus more solid. In the end, Jason can just discuss the gods in theory, because while he had met plenty of them that didn't mean he had a full understanding of how they were the way they were.

"That might be how it started...I'm not sure it's quite that any more," Jason replies after some thought. Any time someone mentioned religion he always felt weird, because on the one hand the gods did have temples and he did participate in the events and ceremonies that honored them. However, most people didn't also call the gods their father or brothers or sisters. It was, at least for Jason, more about respect and honor towards them than what he would deem as flat out worship. Worship implied not questioning them, not seeing the faults and flaws that existed there.

"Competition, rivalry, and a distrust for what's not ours...I don't know. The distrust and hatred goes back a long, long time. I'd say we can't remember, but a lot of it is pretty well documented in history. I never really thought of them as enemies though or, if I ever did, that part is gone now." Possibly quite literally, since it wouldn't make sense for Juno to wipe his memory of his time in Rome only to return the memory of possibly disliking or distrusting Greek-related aspects of things. Though, he can certainly remember those early days before his memory returned and feeling a general unease about everything related to Camp Half-Blood. He'd rather not think about it too much though.

"I mean, I can hardly hate the Greek demigods when one of them is also my sister."