The main reason I'm an atheist

[Wryetui]

If you are done with the laughing, I will repeat my question for the third time. How is the size of the universe proof for God's existence or not?

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 Following your logic (?) the Creator of a universe He created ex-nihilo cannot exist because the universe is too big? I am sorry but this is pretty poor. If the other reasonings that led you to atheism are like this one, I am not surprised you are an atheist.

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If a Christian says, "Just look at the universe and you can see that it was all made just for us.  What further proof of Jehovah's existence could you need?" then we get to point out that the universe does not look like it was made for us. 

Does a speck of mold in my refrigerator may believe that the refrigerator was made just for it?  If so, that proves more about the mold's mindset than it does about the refrigerator. 

When humans believe in gods because the universe looks like it was designed for us, those humans aren't being logical.  Rather, they are indulging in a fantasy characteristic of egotistical refrigerator mold. 

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In answer to your question:

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Why was posting memes that I thought answered the question construed as laughing? 
wiploc and Ape posted excellent answers.  I agree with them.
Earth is insignificant even within our own solar system.  There are literally billions of galaxies.  And yet many people actually believe that god created the entire universe 6000 years ago, to house his pet humans.  The vastness of the universe seems (to me) to refute the concept of god that I knew as a child: as a sky-father who knew every thought in your head and freaked out when you said "god damn".   I have come to the point where I also believe that a deity is very unlikely to exist.  And that's where I am.  

I considered them as laughing because they did not have any honest intention of debating and gave no information, they are entirely made for the mere purpose of mockery.

I do not see your statements as correct. "Earth is insignificant even within our own solar system", that depends on how do you measure significance. In my opinion, the earth is the only significant part of the universe, since it is the place (known place) where God created humans in His image and likeness.

"There are literally billions of galaxies.", I did not know that, but I am not a follower of blank statements, and I need proof in order to believe things. Where did you get this information from?.

"And yet many people actually believe that god created the entire universe 6000 years ago, to house his pet humans", I believe exactly nothing of what you have posted here.

"The vastness of the universe seems (to me) to refute the concept of god that I knew as a child: as a sky-father who knew every thought in your head and freaked out when you said "god damn", the idea that you can actually do something to change God's emotions (as you said in "freaked out") is entirely made-up. God's can only feel love for you, and all the other feelings are born from the love He feels for you. If you believe "God" will get angry at someone for cursing you are not talking about the christian God at all, because, how can you believe that a created being can change an uncreated being?

"I have come to the point where I also believe that a deity is very unlikely to exist.  And that's where I am.", I see.

The picture you have posted gave no information to our cause. I need to know what means that "God make things happen just for you". What kind of things?