Poor Emma. She didn’t want to lose another person she loved. Then as the Dark One decided to get revenge for Neal’s death and take out Zelena/darkness at the same time.
Smart plan but poor execution. I just hope they explain how she was able to bring them back and hide the DO status from Hook.
Also, in a way I don’t blame Hook for being upset with Emma. He hated the Dark One to his essence and begged Emma to let him die.