Likewise, an Atheist definitely has every right to despise and/or disbelieve in God. But, though they are “without God,” God still is. He’s here. And, He is their God, though they choose not knowing Him. Ignoring someone does not make him vanish.
For therefore we both labour and suffer reproach, because we trust in the living God, who is the Saviour of all men, specially of those that believe. -1 Timothy 4:10
Behold, I stand at the door, and knock: if any man hears my voice, and opens the door, I will come in to him... Revelation 3:20