Supernatural

Thinking it through

John 1:1-3 ESV
In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through him, and without him was not any thing made that was made.

Believing in God implies believing in the Creator who is outside and above creation creation, beyond nature, therefore supernatural.
If you don't believe in the supernatural, your belief is in something within nature, which is not much different from saying you worship an idol, something other than God.
One or the other is true, but not both.