I had this idea of a story in which aliens come down and make contact, the aliens are acting against their best judgment in doing so. They give us a simple message, which is that we need to become racially homogeneous and wipe out all the less achieving races of our planet, they specify that our white race is the only race which should be preserved, with all non whites wiped out, with the jews as the race with the highest priority for extermination. That we need to make slaves of our lesser sex to our greater one, and specify that the better sex is male, and the lower sex is female. They say that it is only then that humanity will have the chance to move on to the next stage of civilizational advancement. From then, humanity's reaction is to reject this advice, and declare a holy war upon the aliens who visited us.