the captain is god on the plane and if you cannot abide by what he directs you to do your only other alternatives are to stand yourself down from the sector or report the captain
2 scenarios:
1. at destination the runway is closed due to an incident with delay indefinite. You are now at minimum diversion fuel. The captain is deperate to get to destination so tells the first officer that we will hang around as the delay should not be too much longer.
2. The senior crew member reports to the captain that the headcount does not match the manifest. The captain says we are going anyway as we need to make the slot or we will go out of hours.
In these cases is the Captain a god? IMHO the most important people on the aircraft are the f/o in case 1 & the senior in case 2. Before anyone asks, both these events have occurred with at least one of the Captains being sacked!
Again IMHO, the problem with Captains tend to be the perception of a Captains role by both crew and the captains themselves.