Y'all do know you can't make Jason be NOT white without changing his whole character, right?
For other characters, yes, because their physical appearance are not that influential in their story, on how they are viewed by people, on their personality formation — you can have a black/asian/indigenous/arab/brown/latino/etc Nico and yes, the hate he gets will have a undertone of racism but at the same time nothing significant on his story, motivation or personality will need to change. This is also true for other characters: Clarisse risks repeating the "aggressive WoC" stereotype but the character itself doesn't change.
This isn't true for Jason, whose main character trait is how he is perceived by others and how he showcases himself to others based on that perception. (specially with how little effort Riordan put on him besides making him perfect-er Percy who's somehow also weaker and less important than him).
Let's not pretend a black, Arab, indigenous, Asian, Latin man, etc, in the USA would ever be treated with the universal reverence Jason gets from New Roma, you can't have the illusion of perfection and most of all, of invincibility they have about him when you see him suffering racism or xenophobia in the middle of a mission. In theory, nothing in his life has ever gone wrong, that's his image, destined to be king, he is supposed to have no weakness on his peers eyes.
He is not trying to prove people wrong, he is trying to prove them right; he isn't worthy despite their prejudice, on the contrary, he only tried to make himself worthy to fulfill their expectations. He can't be a woman or an immigrant or have a visible disability or any other thing that strays him from a perfect ideal by western society standards, and be that same character.
I'm pointing at the sign again: The guy whose single canonical character trait is that he was perfect, with no visible suffering and never had his capability questioned and so carried the weight of over estimation as a hero, can not be part of a visible minority and still be the same character.
Because he has no visible suffering, all his struggles are entirely ignored. He was hoisted as praetor with no questions, lead the legion as a kid. No one opposed, hated or underestimated him, quite the opposite. People believed in his "flawlessness" with so much conviction, that he was overestimated to the point of abandonment.
Jason Grace was perceived as having NO problems, none of his capabilities were ever questioned. No one had even conceived the possibility that he might need glasses. Because he was never doubted.
I'm a black woman and I'd never be treated like Jason. Hazel wouldn't, REYNA wasn't.
I might be the single person correct in a discussion, the most knowledgeable, holding two degrees on the subject and, until I can prove it beyond question, I still hear "look again/ are you sure/ well, (white man) said it wasn't like that". My authority is always questioned.
So either you pretend there's no systematic racism in the world and no one with divine blood is a biggot, ever, or you rewrite the entire character.
Other characters were written in much more detail and had much more development and care. Jason was not. He has a wide range for adaptational additions, because RR couldn't have bothered with him canon material is scarce, but that also means any loss of canon material is greater.
Tell me, how are you going to tell the story of that same character, if he goes through what I go?
