Negative atheist: Kalam argument example, Everything that begin to exist has a cause. Where does god come from…what caused him to exist??Philosophy is so much easier when you can put words in your opponents' mouths.
Christian: I think you misunderstood the argument. It does not argue for everything that exist has a cause, but everything that BEGIN to exist. God did NOT BEGIN to exist thus needs no cause.
Negative atheist: Then kalam argument is just another God of the Gap, everything that you believers can not explain is easily blamed to God. “God did it!”
Christian: That is false, Kalam argument leads as to a beginningless, uncaused, timeless, spaceless, immaterial cause of the beginning of time and material( the Universe) we, Christian call God.
Negative atheist: Yah yah! Have you not read that scientists can show that something can come from nothing given the laws of physics.
Christian: Is that not amazing, what part of nothing do “your” science sources do not understand!
Negative atheist: Well, molecules collided together and boom, we have the big bang.
Christian: Well, but there we already have something “Molecules”. How could that be something from nothing?
Update: The original author asks me to note that the dialog is fictional. He (I think) also asks how he's putting words in his opponents' mouths. That's kinda what a fictional dialog means: you're not using the words someone else actually said, instead of doing what an honest person would do: using arguments actual people use.