Does Satan only promote evil-looking or vile things?
No. Satan does not merely promote Skid Row or the vile aspects of life. He can also promote the greatest technology and the most beautiful things on earth, as long as they serve his own end. Therefore a Satanic system may appear outwardly attractive or non-evil while being inwardly corrupt to the core.
Les explains that when he calls this empire Satanic, he is not saying Satan only works through ugly or degraded things. Satan is not just the promoter of Skid Row; he does not just promote the vile aspect of life. Satan can promote the greatest technology and the most beautiful things on earth, as long as it is for his own end. So this great world system may not be intrinsically evil in its outward appearances, but its inward part is corrupt to the core.