The Holeons are just a over religious species. They just start wars over others that aren't the same religions.
Not much is kwon right now, only when humans met them, is just about the only pieces of history they have right now.
When Humans met them they tired to be allies, but the Holeons "Over Religious" mind got a hold of them.First when Humans met them, the Holeons were horrified to find out that they weren't the same religion, which is called Noeloh (Pronounced Nhor lo), so they quickly thought them.
Some Humans turned Noeloh, but not all. The Holeons were mad and would kill them if they didn't all turn Noeloh, all humans, but humans didn't want to turn Noeloh, so the Holeons made war.