Moreover, to get his racial interpretation in [RV 4.6.13-14], Geldner has to unnecessarily assume "attraction", i.e. inaccurate agreement between krs… - Hans Henrich Hock

[RV 1.100.18] is the only one among these that contains a word meaning white or light. Given that the very next line begins with a reference to the sun, it is perfectly natural to assume that white or light here refers to the brightness of the sun or of a world that is illuminated by the sun, see Sayana's interpretation. Geldner's tentative equation of white/light with skin color is not required by the context.

The expression róma prthivyâh (1.65.8) ‘the body-hair of the earth’ ‘the plants’, suggests that the metaphor of tvac- as the ‘skin’ or surface of the earth was well established in the poetic language of the Rig-Veda.

“Indo-Europeanists must exercise caution, lest they unwittingly support ideologically motivated agendas”!