If God created the universe, then who created God?

If God created the universe, then who created God?
Answering the Critics
by Jonathan Sarfati

A number of sceptics ask this question. But God by definition is the uncreated creator of the universe, so the question ‘Who created God?’ is illogical, just like ‘To whom is the bachelor married?’

So a more sophisticated questioner might ask: ‘If the universe needs a cause, then why doesn’t God need a cause? And if God doesn’t need a cause, why should the universe need a cause?’ In reply, Christians should use the following reasoning:

Everything which has a beginning has a cause.1
The universe has a beginning.
Therefore the universe has a cause.
It’s important to stress the words in bold type. The universe requires a cause because it had a beginning, as will be shown below. God, unlike the universe, had no beginning, so doesn’t need a cause. In addition, Einstein’s general relativity, which has much experimental support, shows that time is linked to matter and space. So time itself would have begun along with matter and space. Since God, by definition, is the creator of the whole universe, he is the creator of time. Therefore He is not limited by the time dimension He created, so has no beginning in time—God is ‘the high and lofty One that inhabiteth eternity’ (Is. 57:15). Therefore He doesn’t have a cause.

In contrast,..." Here’s the link to the rest of the article.