If they adopted a red diamond as the symbol, liberals would just bitch that it shows insensitivity to the blacks who were forced to work in African diamond mines.
Article 2 - Distinctive emblemsThe traditional emblems are still used, and member ICRC entities are allowed to place their distinctive emblem (Red Cross, Red Crescent, etc.) in the center of the Red Crystal.
1. This Protocol recognizes an additional distinctive emblem in addition to, and for the same purposes as, the distinctive emblems of the Geneva Conventions. The distinctive emblems shall enjoy equal status.
2. This additional distinctive emblem, composed of a red frame in the shape of a square on edge on a white ground, shall conform to the illustration in the Annex to this Protocol. This distinctive emblem is referred to in this Protocol as the "third Protocol emblem".