Since the law brings only death, Rom 7:10, is this not suggesting that they are self condemned by their own rules?
Good question! I like your questions.
It does but that isn't the only "thing" we can discern from what is written.
Rom 3:19 Now we know that what things soever the law saith, it saith to them who are under the law: that every mouth may be stopped, and all the world may become guilty before God.
Man is proven guilty by many means.
1. By the witness of Creation.
2. By the witness from Consequence.
3. By the Gospel
This is enlightenment necessary for salvation.
All of these are natural.
I believe you are mistaken. I ask that you reconsider your position that enlightenment can only come "directly from the hand of God" some time within the life of an individual.
1. Man can live his entire life without God and still recognize a Creator without any need for a defined set of laws.
2. Man can reason such information from his own intellect and Consequence.
3. The Gospel is necessary to know the "WHO/WHAT" of salvation. It takes men of faith to pass the understanding of their faith along to other men. We do this by preaching the simplicity of Christ in words easily understood and consumed by the language we naturally speak.
I'm going to be honest with you. I find it very rare for anyone to do the work I just did above to create a layout of salvation relative to our understanding. "Calvinism" just "skims" the surface with the defensive method of "deny deny deny deny deny".
If you will take this approach with me, I believe it will change your life.