Board Thread:General Discussion/@comment-27603417-20151013025006/@comment-4427410-20151020215008

I mean Snow and Charming went through the purest heart door, so I say PLOT!

It's PLOT! Snow and Charming were not really "pure" at the time. Both already had Lily's kidnapping on their conscious. Snow also had Cora's murder on her conscious. I'm going for a long shot here, but perhaps their intentions at the time were pure - namely to get back to the "land of no magic" and find Emma to save everyone from Zelena. Regina simply wanted to destroy Zelena at the time, so her intentions were not pure. By the time she defeated Zelena in Storybrooke, her intentions had changed.