I know no one asked for this, but I am going to provide a play-by-play anyways because I want to. This is what was going on with Mint Marine and White Orchid as Silver talked to them about Changeling Nymphs. If you don't want to read that for whatever reason, then skip the rest of this post.
It starts off with Mint Marine comparing Vampires to Changelings, which would reflect a popular attitude towards Changelings prevailing in Equestria at that time. He eleaborates, "there were two of them at..." trailing off at the end of the sentence.
>>104088 This begins a pattern in Mint Marine's speech where he can never name Comte Burgher, or say explicitly what happened to him. Every time it would be appropriate to name his abuser, or to say the abuse happened, he becomes silent for the length of the time it would take to say the word, then proceeds with his sentence, or stops all together. This reply also tells us something else important about Mint Marine. In his mind, the Changeling race is intimately associated with the experience of his sexual abuse, since that is the only time he has ever seen a Changeling. In his mind, those Changelings and his abuse are linked.
Both ponies hang their heads at the mention of the abuse
>>104091. Silver starts off with empathy, but presses his contention that the two changelings should be sympathized with
>>104092. Silver is facing an uphill battle here for two reasons. The first is that Changelings are a damned near mythically evil set of creatures that their country has just fought and lost a war against. The second is that Silver is trying to push these two colts to sympathize with and express pity towards two Changelings, when these two colts themselves feel entitled to sympathy, and aren't entirely willing to share the pity pie.
Mint Marine relates his negative experience with those two specific Changelings.
>>104093 When I first wrote that scene many months ago, it had a cloth placed between the foals and the changelings, such that they could not see each other, even as someone entering from the door could. The reason for that is that the Changelings had originally had a view of the colts, and would hiss and lunge at the colts scaring them half to death. Thus Comte placed a veil between the two sides so the Changelings couldn't see the colts and wouldn't act aggressively towards them. It was kind of nice being able to make use of that detail which was not able to be expounded upon at the time the scene was described.
In the next few bits of dialogue, Silver tries to explain that the Changelings were hissing at Mint because they were hungry, and implores Mint to try to take the Changeling's point of view. This is a fairly normal form of moral reasoning, just asking someone "what would you have done if you were in their position?"
>>104094 >>104095. Mint Marine, however, will have none of this. For him, the way of the world consists mostly of the strong doing what they can, and the weak suffering what they must. With Mint being a small blank-flank pony with no mother, father, friends or connections, that means a hell of a lot of suffering on his part, and a hell of a lot of the strong getting away with it. Mint's father abandoned his mother when he was very young. His mother became an alcoholic, and was unfit to raise him. When his last relative died, he was placed in a Church-run institution that at best fails to replace a family and at worst is oppressive, while never integrating into the life there. And above all of this, the specter of Comte looms. His entire life is filled with examples of people doing things in their own self interest that ultimately caused suffering to him. Thus he is not soothed by a call to "look at it from their perspective." Mint knows very well that his father wanted an easier life than to settle down and raise a foal, thus he left him. He knows that his mother loved alcohol, and chose the bottle over him. And he knows very well that Comte and several of his associates are sexually attracted to prepubescent foals. Mint's conclusion from this whole set of experiences is that need does not morally excuse causing harm to someone else. And if need
does morally excuse causing harm to someone else, then morality is a frivolous mental exercise that has no real purpose for being, and may as well be jettisoned for a nihilistic struggle for power, which is all Mint has seen in his life anyways. A second and related issue is that Mint sees Changeling feeding as inherently evil, as it requires literally stripping the happiness from a pony for their own sustenance. Thus a changeling's need to feed inherently requires harming a pony in about equal measure to fulfill. That, in Mint's mind, is evil.
After this, Silver goes quite a step further, trying to humanize... er, equinize the Changeling Nymphs by describing them as beings with personalities, ambitions, goals, and fears all of their own
>>104098 >>104103. This is a more successful approach than the last, but it still receives push back from Mint. Silver is still asking Mint to have pity for the Changeling nymphs. However, Mint still feels entitled to be stingy with his sympathy. He believes his sufferings have earned him the right to be sympathized with, and the right to be indifferent towards what he sees as monstrous parasites.
The response to these two bits of dialogue is significant, because it shows that White Orchid has been roped into the conversation. When Silver tells the details of the two Changelings he knows, White Orchid's first instinct is to reject the truth of the assertion. The idea that a Changeling could be just like a pony is just a bit outlandish to him.