Since nobody can think about everything, either in pieces or as a whole, how in the world will anyone ever be able to think about something that is outside of the universe? Or how would anyone KNOW that there isn't something outside the universe?
The universe is everything by definition. Thus talking about something "outside the universe" is just nonsense.
Since everything has a cause, and even the idea that something might not have a cause has a cause, what is the cause of the universe? Even Hawking, in some of his final writings, says that there was a cause that caused the universe.
You say everything has a cause, but that's your belief, it's not science.
Before the universe existed, something was there that gave the universe its existence. We can say "before," because "after" the creation there was time. So, we can say before, because time exists now, after, and we are within that time, saying "before."
You say "before the universe existed", but there's no before the existence of the universe because from what we know time was created with the universe. Thus you're just using bullshit arguments to "demonstrate" your religious nonsensical belief.
Playing with the Jesus-idea is not relevant to the idea of atheism. "Jesus" is an idea that comes after there is understanding of the existence of God. You might as well say Pete, or Sam, or Joe if you don't understand that God exists. So, why bring Jesus into it?... except that you naturally know that God exists?
You're playing down it, but your bs religion is full of bullshit, like bushes in fire that talk to people and zombies that are the saviour.