I think that holds true to her rigidness. Nova had a duty, and it was BF’s job to see that she fulfilled it. I also think that just because true love is the most powerful, that doesn’t necessarily make it- hmm… I don’t want to say “good”, but I don’t know what other word to use. Gold used true love to unleash magic in Storybrooke, and that had dire consequences, not all of which were good. I think the BF knows that true love is powerful, and power has to be handled responsibly.
It wasn’t kind of her to deal with the situation that way, and perhaps it wasn’t even fair- but I think it falls in line with her being a “lawful” character. I don’t distrust BF (even if I don’t like her) because she is such a rigid character. You can always trust her to behave a certain way, following a certain code. Other characters (many of whom are far more likable!) aren’t always trustworthy because it’s difficult to discern how far they’ll go to accomplish something. A great example is Snow and Cora’s heart. Regina didn’t think for a moment that Snow had done anything to the heart because up until that point Snow had never done anything of the sort and she believed she could trust Snow to behave a certain way. When she didn’t there was a huge amount of fallout, especially concerning the darkening of Snow’s heart. (Again, this is not unlike the Paladin losing his powers.)
"Nothing is easier than to denounce the evildoer; nothing is more difficult than to understand him."
