1. Some Hadiths associate blackness with negative traits - e.g., Sahih al-Bukhari 9:89:256 (Ethiopian leader) and Sahih Muslim 510 (black dogs).
2. Qur'an uses color symbolism - Surah 3:106-107 ("black faces" for the wicked vs. "white faces" for the righteous).
3. Early Islamic society had racial hierarchies - reflected in historical commentary (Ibn Khaldun).
4. Christian contrast - Galatians 3:28 and Genesis 1:27 affirm all humans are equal and made in God's image.
Summary point: Some Islamic texts and historical interpretations contain ideas that today would be considered racist, whereas Christianity consistently affirms universal human dignity.