changing one's worldview is extremely difficult and painful, he won't change, just because humans really don't. you can link as many sources as you can, they will just ignore them, it's human psychology. no one on this forum will change anyone's mind unless they want their mind changed.
hell, the maga bois literally made a new social media platform (parlor) because reality is slapping them in the face, and they can't accept it, they'd rather leave.
we are not in the position to help indoctrinated people, they need real professional help, and it sucks.