The purpose of the argument is not merely to establish that the universe had a cause, but that the cause is a personal creator god. The unstated conclusion in the above argument is that "God is the cause of the universe's existence." That is the version we have been discussing. If you want to omit this conclusion from the discussion from this point on, then the KCA ceases to be relevant to the topic.
You couldn't be more wrong.
A. The purpose of the KCA I advocate is to determine if it is reasonable to believe that the universe had a cause.
This is analogous to testing out the gloves in the OJ Simpson trial to see if the stain on them is really blood.
B. Now analyzing the traits of the cause of the universe narrows down the list to:
1. The Christian god
2. The Muslim god
3. The Jewish god
4. A mean god
5. (From other suggestions) An immaterial being pretending to be a Flying Spaghetti Monster.
6. (From other suggestions) An immaterial being pretending to be an Eternal Flame.
This is analogous to listing the possible suspects who belong in the gene pool of the blood cited in A.
From these two pieces of evidence alone, one cannot prove that the blood is really OJ's, but it rules out a whole bunch of other candidates.
This thread doesn't seem to require that I provide proof positive that God created the universe. So supporting arguments are allowed, and the KCA is one of the best.
The conclusion of the version you advocate is Goddidit.
If you can read black print on white paper you will not find the phrase "God did it" in the following conclusion of the KCA that I advocate:
"Therefore, the universe has a cause for it's existence."
I find this utterly amazing coming from you. You would actually have me agree with you that my version of the KCA ends with the conclusion of "Therefore, God did it" and thus purposefully commit a logical fallacy. Speaking for myself, I would rather make an intellectually honest argument than win a debate. As I said above, I do not claim that the KCA provides proof positive that God created the universe. I only offer it as supporting evidence for that belief.