what made God if one exists?

How can the universe create itself out of nothingness? Doesn't it make sense to assume the existence of a Creation. This statement is tricky because it sneaks in the false assumption that GOD came from somewhere and then asks where that might be. The answer is that the question does not even make sense. It is like asking, “What does blue smell like?” Blue is not in the category of things that have a smell, so the question itself is flawed. In the same way, GOD is not in the category of things that are created or caused. GOD is uncaused and uncreated—He simply exists.

We know that from nothing, nothing comes. So, if there were ever a time when there was absolutely nothing in existence, then nothing would have ever come into existence. But things do exist. Therefore, since there could never have been absolutely nothing, something had to have always been in existence. That ever-existing being is what we call GOD ,GOD is the un-caused Being that caused everything else to come into existence. God is the uncreated Creator who created the universe and everything in it.

The universe requires a cause because it had a beginning, GOD unlike the universe, had no beginning, so he doesn’t need a cause. Einstein’s theory of 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 is the creator of the whole universe, he is the creator of time. Therefore He is not limited by the Reality, Time dimension He created..

The Big Bang is the creation moment, and aligns well with the biblical view of creation.

There is no such thing as nothing, there never was a period when there was nothing. God is, that is why he is called eternal, God was, is, and will be. Our frame of reference is bound to the universe and its time, since we, along with the universe are finite and temporal.

So the question of 'before God' is meaningless, because God exists in the place of nothing, thus nothing and a beginning for God is not possible. But God is the beginning of all that we know because we belong to the universe which was created by God. All the laws and properties of the universe that we know are about the universe which was created by God, God is not contained or constrained by what God has made. Since beginnings and endings along with time are fundamental parts of our universe we can not escape them, but since God is the maker and is greater than our universe, God is not bound to the same rules.

Cosmologists believe that the Universe, and with it space and time and every thing it contains, appeared and expanded into being some 13.7 billion years ago at the Big Bang, and that it has been expanding ever since. Scientists know that the Universe had a beginning and the laws that govern it will produce an end to the Universe.

Isaiah 43:10

“You are My witnesses,” declares the Lord, “And My servant whom I have chosen, So that you may know and believe Me And understand that I am He. Before Me there was no God formed, And there will be none after Me.

Isaiah 42:5

Thus says God the Lord, Who created the universe and dispersed them out, Who spread out the earth and its offspring, Who gives breath to the people on it And spirit to those who walk in it,

Isaiah 44:24

“I, the Lord, am the maker of all things, Stretching out the heavens by Myself And spreading out the earth all alone,

Isaiah 40:22

It is He who sits above the circle of the earth, And its inhabitants are like grasshoppers,

Who stretches out the heavens like a curtain

And spreads them out like a tent to dwell in.

Isaiah 45:22

“Turn to Me and be saved, all the ends of the earth; For I am God, and there is no other.

Isaiah 66:1

Thus says the Lord, “Heaven is My throne and the earth is My footstool. Where then is a house you could build for Me? And where is a place that I may rest?

Jeremiah 23:24

“Can a man hide himself in hiding places So I do not see him?” declares the Lord. “Do I not fill the heavens and the earth?” declares the Lord.

Haven't we all always existed?

God has always existed. His power speaks existence itself.

Another God.

It'd make more sense to verify that one exists, before starting to speculate about what made it.

First things first.

Super god, and he was made by Super Dooper god, etc. why can you not understand this? It's so simple.

No, humans have not always existed.

Turns out, in a strange twist, it was the Virgin Mary.

Have you ever heard of the double slit theory?