Swamped

Could be that this branch of the Church of Reth holds the Rider of the swamp in high regard, maybe even considering him blessed or protected by Reth, and that this grebling has unwittingly been sacrilegious by attacking you. But... Why would that be?

You'd better wait to ask Rider about it later. If Rider has any kind of sway here because of his reputation, it wouldn't do well to spoil it with potentially irreverent questions into why.

Ask if they know anything about the recent intrusions in the camp. Were those also innocent investigations by the benevolent Church of Reth?