Lincoln was far from atheistic, and there are many quotes to prove it.
Again, you are unable to contemplate how a con artist can present himself as "Christian" by spouting a few quotes.
You can understand the concept with someone like Hillary Clinton, but you can't help but see Lincoln as honest.
You have a blind spot in regards to Lincoln.
His law partner says he was an atheist. Maybe the law partner is trying to exploit his relationship with Lincoln and is just making that up, but it's credible enough that it should not just be dismissed lightly.