Demonstrated racial bias by Stardock.
I highly suggest you actually try to make even the tiniest bit of effort to familiarize yourself with the lore or even the game period before you throw around accusations like this. You need to grow up. This is a fictional world created by Stardock, it contains red people, purple people, and blue people. They can frankly include or not include any skin color they want and it has no relevance to any bizarre little real life political power trip your currently on about. There are no Caucasians in Elemental because that would imply they are from Earth and their not.
When creating a custom sovereign, the player is given a choice of skin color. No such option exists for any other unit. All other units, without exception, are Caucasian.
Skin color for troops is set by your race whether it's green or yellow or whatever. Feel free to mod in a race with whatever skin color you desire. I frankly think it's totally unnecessary to have the option to create troops with all the colors of the rainbow. Why even have races then?