I hope we get to see Rumple tell Belle about Bae and that Belle then understands the reason that he “chose” power over her and kicked her out (she’s a smart cookie so I imagine she would catch on). She kept asking Rumple to tell her about his son so I would bet that she would be supportive of him in his quest to find Bae – but I don’t think she will be accepting of his methods if they hurt people. The writers could take their conflict to where Belle tries to show Rumple how he can use his magic in a constructive way to find Bae, however after all those years of competing with Regina and making deals with people that were less than stellar that isn’t going to be natural for him.
On the other hand, Rumple put Belle on a pedestal (literally put her on a pedestal via the teacup) and maybe we have too. The writers have always shown us unexpected and surprising sides of the fairy tale characters we thought we knew, so maybe they will surprise us with Belle too and show us a side of her we aren’t expecting. Maybe she will be so mad at Regina for tricking her and locking her up in both FTL and SB that she will “take Rumple’s side” in their power struggle and won’t have a problem with how he handles things.