First let me set up the scenario. New people are born every day, thus providing a fresh batch of the naive on a daily basis. (Hence the saying, there is a sucker born every minute.)
There are two kinds of Atheists: 1. Satanists incognito whose goal is to fool man into leaving God's side, and 2. the fooled.
If God is with us, then who can prevail against us? No one. That is why Satan's #1 strategy is to fool man into voluntarily leaving God's side. As the example of Eve being fooled into disobeying God and then getting Adam to do the same shows, it is possible.
One of the most effective ways for Satanists to fool man is through the use of the reverse gullibility principle. That principle is illustrated well in the fable "The Emperor's New Clothes".
A real example in history involves doctors refusing to wash their hands despite the evidence that it saves lives simply because the prevailing belief was "a gentleman's hands are clean" and the fact some self appointed experts dismissed the evidence out of hand.
So when Christians are telling people that they are dirty with sin and need to be cleaned by the blood of Jesus and they dismiss it out of hand, you know what that reminds me of?
I played vinyl records when I was a kid and CD's when I was a teen. I know all about the skipping for both. My first computer was a CoCo 3, and my second was a Tandy 1000 TX.
I'm sure a lot of people think I'm a dinosaur, but I'm only in the old age of youth. I hear 65 is the youth of old age.
Anyway, the Satanists don't stop trying to trick people into leaving God's side and so the Christians can't stop helping the fooled to see the light. Satanists don't change. They know God exists and they choose to rebel! They know the consequences.