It really scares me.

[Sword of Christ]

You just don't know if this universe was made by a god (let alone your god), so any argument from you is a "non-argument from ignorance"...

You can say what we understand of evolution and laws of physics are irrelevant to the question of whether God exists or not. It would work if the universe is the product of an eternal infinite intelligence and it would work if you had an infinite continuum and parts of the infinity by random chance and unintentional coincidence would be arranged a certain way. I don't really think you should base a belief in God in the laws of physics but there's nothing we discovered in science that would disprove or go against the existence of God evolution included. Atheists do often refer to the Big Bang and evolution as explanations in place of God but though true these are all things that ultimately can still be traced back to a supreme being, the Creator, the unmoved mover.

Well, duh!!
Add magic and anything is possible... Even physics! Quantum mechanics! General Relativity!

If something is sufficiently beyond our understanding then it will seem like magic to us. In reality it will of course be a process with a cause and an effect with a reason. God is the cause of the universe, the designer of the universe and the reason why everything and everyone exists, the purpose of life itself. The alternative you would suggest isn't necessarily less magical, it's arguably more magically as you have a cause without effect and existence without a reason/explanation. While it's valid as a belief it's not as compelling and faultless a belief as atheists think it is, disagreement with this belief isn't a delusion or a denial of facts/reality.

"the why"?
Oh, you mean the "it's built custom made for us" thing?
Why must there be a thinking entity generating a reason for our existence?

Why not? We're thinking entities so you can have a personal conscious cause for the personal conscious effect. You have the Creator that's God and the creature of God and that's you right there. You have the relationship between the creature and the Creator and that's when you can go into freedom of will and morality, the nature of good and evil and so on.

Do tell us all about this level of "fine tuning"...
Can't wait to hit the search button and provide you with the 70 page paper that debunks all the fine-tuning constants...

We know that the development of life was an utterly complicated process which took billions of years and involved billions more of years of cosmological formation to set up from a starting point in time and there was no margin for error in the initial mixture, the raw ingredients of the universe. It doesn't prove Gods existence but I would suggest it's perfectly compatible with one. Therefore science/evolution has no beef with God. You can still be an atheist though seeing as it's really just a counter belief. Even if say you don't think there is any good reason to believe/have faith in a God or anything beyond the physical world/universe then you're still making a counter statement to the ascertain of faith which claims otherwise.

So is the flying spaghetti monster, Russel's teapot, the invisible pink unicorn and a bunch of others... oh, let's throw in Allah, just for good measure!

Allah is just the Arabic name for God. But all the things you mentioned have no context with the rest of reality and they wouldn't matter to us whether they existed or not. If God exists that's a very big deal and if God doesn't exist that's equally a very big deal. What you don't have is an invisible teapot but something life and worldview defining.

Which god?

Anything that is eternally existent beyond space and time who deliberately brought the universe into existence with a purpose and design in mind will count in my view. So I'm happy with the Jewish and Islamic views of God of course and the Hindu concept though a little different I think still works. In addition to God you may have lesser god like beings, in the Christian context those will be your angels, demons and what have you. Polytheism based religions such as Mormonism would deny the existence of God you just have an eternal universe but that puts them on a par with atheism in my mind, only with some immortal supernatural beings added in.

In Christianity you have the Trinity which is the main point of contention but I would see it as some kind of mystical depiction of God rather than literally three different persons. Divine Trinities are a common theme in many pagan pre-Christian religions throughout the world so I think there is perhaps some mystical universality there. Islam and Judaism are very much against this of course as well as depicting the divine in human form, so these are the main disagreements between the different conceptions of God and how it ought to be approached.

I think you should be made aware that you also have nothing to support the case for the existence of god... any god.

There is quite a lot to support the existence of God, the supreme power or whatever you want to call it. There can be any number of other god like beings in addition but you're not suppose to worship them in the monotheistic scheme of things.