system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why was Gilgamesh allowed to fight the Frost Giants?

In Eternals, Gilgamesh mentions in passing that he helped Odin and the Asgardians defeat the Frost Giants when they attacked Earth in the 10th Century. This is in spite of Sersi saying that the Eternals were only allowed to intervene when Deviants attacked (she gives this as the reason why they didn't help against Thanos).

The Frost Giants obviously aren't Deviants, so what gives?
gpt
I think the three simplest explanations are:

1. He joined the fight before the Eternals knew whether the Giants were deviants or not, on a ‘well we’re not sure, let’s not let them wipe out all these humans though’ basis.

2. He got caught up in the conflict just by being in the wrong place at the wrong time (and maybe didn’t *mind* getting into a battle).

3. He didn’t get permission, and fought anyway, for which there may or may not have been repercussions we just don’t know about.