I think Satanism is illogical and the philosophy put forward by Jesus logical (I'm agnostic BTW).
For example: It only makes sense to treat others the same as you'd like to be treated, to think about other people's wellbeing, to be ethical and to be honest. Because doing so makes makes life happier and more harmonious for everyone. What goes around comes around. Don't you want everyone to treat you fairly, be considerate, ethical and honest towards you? Then do the same to others! You will show the example to follow. The ultra selfish mindest of Satanism, on the other hand, is the best road to conflict, aggression, narcissism, etc.
Satanists think they're strong with their philosophy. However, much of what Jesus preached is also a philosophy that only the really strong may stand. For example, it takes an awful lot of resistance to stop oneself from hurting another person even if they have hurt you (the "turn the other cheek"). This doesn't mean that you have to stay there without acting, but just that you have to act in a reasonable and fair way... or else you become exactly what you're fighting and are just as bad.