In my personal opinion, We the Stewards are only authorized to act on a community consensus and are not responsible to decide whether WMF principle, practices, and/or rules are violated.
(Again, I am not speaking on behalf of Stewards, just my POV.)
Any other question, such as whether Croatian Wikipedia currently so violates WMF's overarching practices, principles and rules for intervention, is something for the stewards, T&S and the Board.