We discuss kresus in a few contexts, and I am not well enough inured about the details of kresus to understand: I thought kores, being more severe than execution, was a de facto end of one's associability with the Nation. How, indeed, could any offense be repeated, if the subject is in effect excommunicated?
H David, Roanoke, VA
Shalom!
I would like to rephrase your question to make sure that I understand it properly: If one is executed there is no "second chance." Not only that, but if one (for example) kills five people before he is caught, and is sentenced five times to the death penalty, there is no effective expression of the additional count and no real difference between 1 count and 5 counts. That being said, seeing that Kares is more severe than execution, that same equation should hold true and there is no explanation of multiple counts of Kares. This is my understanding of your question, and based on that I will answer. If I did not get it right, please let me know in a follow-up question.
The first major difference is that each count of Kares, when done as a Shogeg, requires a Korban Chatas; therefore, the multiple counts have a great immediate significance. Second, keep in mind that Kares does not take its "ultimate" effect until after death, and until then one can repent, even if the sin was committed intentionally. However, repenting from 10 or 100 counts of Kares will be much more difficult than repenting from one, as the weakening of the connection to G-d begins immediately; it is the ultimate excision that takes effect only after death. So there is a very real and germane discussion about how many counts of Kares for which one is liable.
I hope this answers your question and, again, if not please feel free to reach out with a follow-up query.
Shimon Brodie