There are some people keep on denying GOD even though they hear about GOD.
There are people mocked GOD and mocked His words in the BIBLE.
They just read a portion and take it out of context then conclude as contradicitions (full of...).
There are people want GOD to appear to them physically and in fact they know that GOD is spirit.
They just simply conclude that there's no GOD because:
17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
John 3:18-21
in order to be free from the LAW of GOd they just simply deny Him.
Peace!