There’s never any sense in arguing with an Atheist or any other person who is resistant to the Holy Spirit for that matter. God doesn’t force Himself on them. Christians are not to cast their pearls in that direction. Once Atheists are trolling on social media, they are usually quite hardened in their thinking. When they realize that they can’t be rational because of their reprobate mind, they just commit themselves to invincible ignorance. It’s sad.
However, when an Atheist is honest and sincerely looking for truth, that’s a different story. Then, they will be able to meet Christ and know.