I love Rumbelle and all, but having Emma order Belle’s death just seems like another way to tarnish her to make others look better by comparison.
For me, RumBelle got to a point where it was pretty much beyond redemption, so an actual life and death situation where he saves her is about the only thing that would make me consider getting back on board with the ship. Doesn’t paint Emma in a particularly nice light, (unless she secretly believes in Rumple so much that she has no doubt Belle will end up being OK), but as far as RumBelle goes, a situation like this was necessary IMO.