To study the supernatural realm of which God would be a part would be unscientific because we cannot use the tools of science and logic to study it. How do you provide evidence of a miracle if it defies the laws of physics? How can you provide evidence of a supernatural being that can willingly defy all physical laws of nature and make himself disappear from our reality? By definition of science i.e. the study of natural phenomena, the supernatural is automatically excluded.
Just because the God who is has not made Himself appear sufficiently to your reality does not mean He has not made Himself appear to those who believe in His name.
John 1:9 There was the true Light which, coming into the world, enlightens every man.
10 He was in the world, and the world was made through Him, and the world did not know Him.
11 He came to His own, and those who were His own did not receive Him.
12 But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name,
13 who were born, not of blood nor of the will of the flesh nor of the will of man, but of God.
14 And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth.
Blessings