Rethnking the existence of god

In short, a true atheist believes there is no possibility that god
exists. Many admit there might be but it's very unlikely.

However many people also believe in aliens. In fact many atheists
believe more in the probability of alien life than the possibility that
god exists.

Those that believe in aliens are somewhat informed by what they saw on
X-Files. People assume that aliens are a bit like us. They're humanoid
in most science fiction descriptions, for obvious reasons. It's fairly
obvious that somewhere else amongst the millions and perhaps billions of
stars in our galaxy alone there will be another civilisation of sentient
beings. There's likely more than one.

The problem is the assumption that an alien life must take corporeal
form. Given the millions and perhaps billions of galaxies and the huge
length of time the universe has been around there's no reason to doubt
that a non-corporeal alien could be created spontaneously or evolve from
a corporeal species.

Essentially why can't god be an alien? It's the simple question I'd ask
all atheists when they dismiss the idea that a non-corporeal being with
power far in excess of our own (such that it would look like magic to
us) could exist.

My question is would this non-corporeal being give a flying fuck about
what happens on the third speck of dust floating around a tiny star in
the backwater of a spiral galaxy. But that's a really heavy one I'll
never answer.

Then there are those who know god exists. They have the proof of
personal experience and the burden of not being able to prove it.