But the larger point is that people still think of Paladins as Crusaders. They’re still modeled after them. “Deus Vult” is a meme. While the subclasses have a diversity of oaths/worldviews, the popular original image of Paladins is still the baseline (Xenk and Dame Aylin for example). I think that they might need to move beyond that.
No, they think about people on a
crusade. Or on a
jihad also, if you will. But intended not militarily, or not only - more as a
struggle, as something that is a fight for justice and good,
from their point of view.
In the real world we all know how tragic and often ironic this can get, but in the world of D&D this makes sense because of how the cosmology works. There are actual good and evil forces, angels, demons, devils, and Good and Evil are actual component of the universe. Since Outsiders like those exists, Good and Evil exist on a
physical level.
This is because Paladins are champions of Justice and Good. And for their appearance and demeanor they don't need to necessarily follow any Crusader with capital C template - hence my example with Rostam which is basically a Persian Paladin up to the intelligent mount. BTW I don't even think Rostam is supposed to be a Muslim but something more ancient, but don't quote me on that.
They often are depicted like
Crusaders because the initial inspiration of the class came from that part of human culture. Paladins of the court of Charlemagne. Way before the crusades BTW even if later popular culture mingled a lot.
Is the
ideals they reflect are the important part. In some DM guide they suggested to use them in an oriental setting for an honorable Samurai. Because they didn't represent the brutality of the Sengoku Jidai, but the IDEAL the Samurai was supposed to follow.
We are talking fairy tales. Ignoring this is in my opinion the fundamental misunderstanding.