In the Great Tribulation, right before the second coming of the Lord Jesus Christ, Satan (the dragon), the antichrist (the beast), and the false prophet will dispatch demons to deceive the nations to fight against Him and His army.
As you can see, the ones who attack the Lord are demons through people. When you see atheists, cults, or anyone in between, know with certainty that you are under demonic attack. Which is a good thing because it says that you are doing God’s will or else they would not even bother with you.
The devil hates God and His saints because he is full of darkness which governs him. But we are in the light and are directed by the light. Jesus Christ is the light and the only way to the Father.