God bless Grimm and all its grey shaded scary aspects. The only complaint is the hero complex that justifies or excuses their immoral actions that is shamed on particular other characters.

It really does delve into the grey morality quite often, doesn’t it? Like a lot of shows in this genre (and most genres, honestly), the main characters are often forgiven for their actions when they are seen as for the greater good. 

I think that’s why the parallels are important, though. To show that what they’re doing isn’t necessarily good within itself, just the motives behind it. The ends justifying the means, so to speak. There should probably be quite a bit more backlash, though.