Why do you not believe in God?

[ktulu]

I'm not sure how this helps you in any way, but I'm sure you will impress me with a mindblowing punchline.

You are basically stating the statement

Everything that begins to exist has a cause is circular reasoning. But all it is

A (Has a begining)
B (Has a cause)

A ->B.

You are saying a basic statement like A -> B is circular which makes no sense.

Not B -> Not A can be derived from the statement.

So Not having a cause implies not having a beginning. It's not circular reasoning to assert what doesn't have a cause, doesn't have a beginning either.

Perhaps if I quote a few definitions... question begging:
wiki :
"Begging the question (Latin petitio principii, "assuming the initial point") is a type of logical fallacy in which a proposition is made that uses its own premise as proof of the proposition. In other words, it is a statement that refers to its own assertion to prove the assertion. Such arguments are essentially of the form "a is true because a is true" though rarely is such an argument stated as such. Often the premise 'a' is only one of many premises that go into proving that 'a' is true as a conclusion"

Something can have a beginning without a cause outside of the environment needed for such conditions. If you imply that the environment is the cause, then why god? why not quantum foam?

If your argument is question begging it will be sound within it's constrains. But it will not be valid.