Crossovers That Should Not Be XV: The (Bad) Ideas Just Keep On Coming

[Jorlem]

On the question of magi and their behaviors, part of it is cultural- it's how the other magi behave, after all, and a few decades of working alone and/or associating with people like that has its effect on you.  Another part is, well, also cultural- magi tend to come from mage families, so they grow up in this culture of callous disregard for human life.  Then there's the practical aspect; giving up your scruples tends to make the research go faster.  On top of that, magecraft is a finite resource; if letting other people learn your spells makes them weaker (on top of letting them figure out how to counter them), you have a powerful incentive to be a paranoid, secretive recluse, which can't be good for the scruples.
There's an anime of one timeline of the Fifth War, as well as the Fourth War (Fate/zero), in case LPs aren't your thing.

And a movie anime of the second timeline, with the third apparently in production, as far as I know.
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Stand between the Silver Crystal and the Golden Sea.
"Youngsters these days just have no appreciation for the magnificence of the legendary cucumber."  --Krityan Elder, Tales of Vesperia.