Some people don’t believe according to any organized religion’s doctrine - but they still believe in a God.
Meh. I've heard that one before.
"22 Then Paul stood in the midst of Mars' hill, and said, Ye men of Athens, I perceive that in all things ye are too superstitious.23 For as I passed by, and beheld your devotions, I found an altar with this inscription, To The Unknown God. Whom therefore ye ignorantly worship, him declare I unto you.
24 God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;
25 Neither is worshipped with men's hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things;
26 And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;