Why does only the natural world or the supernatural world have to exist? Why can they not coexist? Science was constructed to categorise the natural. It is for this reason that science cannot explain religion, as religion is of the supernatural and thus cannot be categorised. And it is a very limited lens as it cannot 'see' everything anyway. Otherwise science would provide the same things religion does but on a 'natural', materialistic basis. But of course science doesn't perform this function.You forgot the alternatives that either the natural world, the supernatural world or both simply don't exist.
Now the latter brings up the entire endless argument of metaphysics and the question of existence, so it shall be ignored. But the other two options are equally likely. If the supernatural doesn't actually exist, then it means that science is perfectly right to use only it's own lens, as the lens can see everything anyway.
Alternatively if the natural world doesn't exist that would mean we exist amongst the supernatural. But the fact that this supernatural world has shown itself to be bound by observable and scientific rules means that it is either no different to the natural world or that it is a cruel mockery of order, an order which every deity worshipped upon Earth lays claim to creating (possible exceptions existing within Hindu mythology, of which I am mostly ignorant). This means that all these are claims upon something which doesn't exist, leading to the idea that the gods are all false.
Since you view religion in terms of science, you have these atheistic beliefs because science only categorises the natural, and religion cannot be categorised because it is not of the natural. It's like trying to view an elephant through a magnifying glass - of course the magnifying glass is not going to see the elephant as an elephant for the very reason that the elephant is bigger than the magnifying glass, and the magnifying glass cannot see it for what it really is.
But I don't believe anyone is truly this stupid to actually believe a God doesn't exist. Majority of you are just seeking attention, and trying to be revolutionaries. There's nothing new under the sun.