Twilight Sparkle's Moral Dilemma

First,  I think I only have 2 or 3 people who read this page so I keep forgetting to come back.  I really would love to build community again so if anyone you know likes Steven Universe, My Little Pony, Stargate SGA, Red Dwarf, etc appreciates gen, and would be good for me to friend, please feel free to send them my way.

On to the point of this post:

The kids and I (and several adults) went to see My Little Pony and loved it.  Upon our return we started talking about the movie and I discovered something: One of the moral dilemmas was not as clear cut for the kids as it was for myself.  For once the message the show hoped to send was so well framed in reality that my kids came to the opposite conclusion!

Any attempts to talk about this moral conundrum are usually met with eye rolls and grunts of despair.  So while the movie framed a great talk for me to have with my kids, my kids refuse to have this talk.  In specific, my 7-year-old says it distresses her to talk about these things and cannot explain why. She says she doesn't know how to have these conversations.

So I realized there was only way to reach a kid who will read any My Little Pony book set in front of her. I need to put the discussion in writing.  So, much to my shock and amusement, I am up early to write pony fanfic.  

So what is the moral dilemma?  The following is cut for spoilers and is written on the assumption you don't really know My Little Pony very well:

( cut for spoilers )

So now I have to figure out how to make a fic about all of this...