Not really, using absurd and impossible examples doesn’t justify anything. I mean, you can toss up ridiculous scenario’s and draw any conclusion from it if you want to, but that doesn’t make your fascist argument any more truthful.
Give me a call next time when you encounter baby Hitler, or baby Mass Murder #2.
You see, here is another of those examples, funnily enough also as unnuanced as it can be. I mean, sure, you can only take the Lannister’s wishes into account, or the stability of the Seven Kingdoms (which turned out not to be that stable after the Red Wedding at all, no?), but you should also take into account that the Kingdoms were ruled by an illegitimate king, and that the King in the North had quite some support from the houses in The North. In what way is anyone justified to finish this war by purging the key opponents to the throne, while you have no way to justify your own cause?
You see, that’s the problem of this arguments based on examples. You just take the context you might want or prefer and you go with them. Meanwhile, you are ignoring the action itself, the intention of the moral actor and the consequences.