If you steal it after the ritual has ended then it's like stealing anything else.
I hope this get adressed ...
How so?
I think it's working the way it's intended right now.
When Halsin is scolding Kagha, part of what he's saying is that the idol isn't anywhere close to the value of a human life. Meaning that the druids wouldn't react in the same violent manner over the theft of the idol under Halsin's leadership.