JayZ wears Five Percent Nation Medallion.
The Five Percent Nation is an offshoot of the Nation of Islam and one of the core tenants is that white people are 'weak' and 'inferior' to black men who hold the power of God.
https://www.dailymail.co.uk/news/article-2598174/Jay-Z-causes-controversy-wearing-medallion-group-believe-whites-wicked-weak.html