Your entire problem is you think the existence of God is theory or philosophy when it is neither. Evidence exists but you are wasting your time if you think you will find it on an internet forum. That isn't how people found dinosaurs.
No you're right, but if you are implying that I can dig and find god fossils then I look at you with a look of bemusement.
I'm sure you will accept the following premise:
God is (if he exists) outside of time and space, that is to say he is not restricted to a single time and is not comprised or restricted to matter, but rather exists outside of both.
As a result finding god using perception alone is impossible, we wont find an old man sat atop a mountain somewhere.
What does that leave us: Logic. So we must use our reason, our logic, to comprehend the existence of a being we cannot see, smell, hear, touch or taste. Logic can be expressed (although rarely is) on an internet forum.
So here is as good a place to look as any. Using pure logic to determine a conclusion is philosophy. So yes, it is philosophy and an internet forum is as good a place as any.
Also you say evidence exists, well if I was searching for dinosaurs why wouldn't I ask someone who had seen the evidence where it was so:
Where is it?
It was a joke. I was replying as if i was God
Well played.