I believe that the God of Israel is real.
Can you make up in your own imagination of what God is, looks like, and what not? Sure of course you can.
However the God of Israel can be found in the bible; and the account of what God is ; is also found there, so people can know the truth about what God looks like.
According to the bible God is love, a consuming fire, and spirit.
I do not believe we can see spiritual things with our physical eyes. It takes faith to believe, that the living God is real and true.
Here are many scriptures from the bible about the God of Israel if anyone here is interested in looking.
Living God - Thompson Chain Reference -
God - Thompson Chain Reference -