Because roids are not human! They are animals! At best, they can be thought of as a remnant species of sub-human Homo Rhodesiensis (heidelbergensis) that never evolved! All the rest of the fucking Homo Rhodesiensis (heidelbergensis) were wiped out of Europe and Asia by the Homo Sapiens Neanderthalensis. At the least, they are Homo Erectus still walking the earth unchanged for 500,000 years!