Should I actually do Heriokh's Rim fight?

I'm at that point and Ravor says my ship is strong enough, but I just can't decide. I mean the way they talk it's burning out an entire base for what could be a somewhat small isolated cult. Should I really condemn hundreds of lives based on what one chaos mutant said. And he didn't even mention anything that made it sound like everyone was in on it.

Just feeling very conflicted... but I want to continue the questline...