Sadly; all too predictable as, I am sure, it was to LaVoy Finicum also.
It just seems they were lulled into believing they had safe travel to their destination.
This is not my hill to defend, but if it were, I would never have split the group. I would never have had all the leaders together outside the refuge to be captured or killed. Either it was a deception that motivated them or really crummy tactics on the part of the militiaman.
Not trying to be critical, but makes no sense. They should have sensed the ferals were about to make a move. Why then weaken the refuge? Seems they'd have began fortifying.