True believers in God get frustrated when the adversary and his followers deny the existence of God. But we need to remember that God told us to forgive and exercise patience.
The Bible tells us in Psalm 14 1-5 The fool hath said in his heart; There is no God. They are corrupt; they have done abominable works; none doeth good. The Lord looked down from heaven upon the children of men, to see if there were, any that understand, and seek God. They are all gone aside; they are all together become filthy: none doeth good, no, not one. Have all the workers of iniquity no knowledge? Who eat up my people as they eat bread, and call not upon the Lord. There were they in great fear: for God is in the generation of the righteous.
The book of Ephesians 4:18 Adequately sums up the people who do not believe in God it says, Having their understanding darkened, being, alienated from the life of God through the ignorance that is in them, because of the blindness of their heart.
Romans 1:20 For the invisible things of him from the creation of the world are clearly, seen, being understood by the things that are, made, even his eternal power and Godhead; so that they are without excuse.
1 Corinthians 2:14 But the natural man receiveth, not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are, spiritually discerned.
2 Timothy 4:3 For the time will come when they do not endure sound doctrine; but after their lusts shall they heap to themselves teachers, having itching ears;
John 3:12 If I have told you earthly things, and ye believe not, how shall ye believe if I tell you of heavenly things? These scriptures are a testament of the awesome God we have and, for those who do not believe in his existence, they must remove the blinkers from their eyes.
Mighty God, I pray for those who have denied you and asked that we show them your greatness, remove the adversary from among your people, open their eyes, bless sanctify and keep us all safe in Jesus name Amen.