Board Thread:Spoilers!/@comment-2153169-20140925181009/@comment-24386552-20141118024850

That was mentioned in a question and answer interview with A & E. That it is a great possibility that when Rumple was revived, he was rejuvenated due to all that darkness, making him feel more alive than ever. Combined with his son's death on top of being Zelena's slave for over a year, he has become basically the same man he was when he didn't have Belle or Bae in his life. He could hardly care less that he was going to take his grandson's mother away from him. And all the chagrin from the townspeople and Belle so yeah there definitely has to be an explanation for his craziness.