A fair comment. Rowling is certainly not so explicit, so I overstated the point. Voldemort, however, is all about doing his own will, and not His will. Indeed, Voldemort recognizes no higher power, nor any system or rules. There is nothing and no one to judge Voldemort. It's all about power and what you can get away with. As the books make quite clear, this is not the proper way to interact with the world.
Given that Voldemort doesn't recognize anything beyond or above our own physical world, he therefore fears death more than anything. Death is just oblivion. There is nothing after that, so Voldemort wants to live forever in our physical world. He says "Death is the worst thing that can happen." But Rowing has an explicit reply: "There are worse things than death."
Lastly, it seemed to me -- unless I missed it -- that Rowling never really came out and said why the term Death Eater was chosen. Surely the overall aim is clear, but the term is, I would say, unexpected. But perhaps we are supposed to see it as a sort of "death cheater". Anyway, I see Voldemort's two great mistakes being: 1) he thinks that doing his own will is the highest good, and 2) he thinks that he can redeem himself from death, or gain mastery over death without anyone else's help. Rowling shows why these beliefs are wrong.