I used to be a Christian & a Calvinist. One of the tenets of Calvinism is that humans are totally depraved. According to Wikipedia, 

"John Calvin used terms like "total depravity" to mean that, despite the ability of people to outwardly uphold the law, there remained an inward distortion which makes all human actions displeasing to God, whether or not they are outwardly good or bad. Even after regeneration, every human action is mixed with evil."

When someone is told they are totally depraved, why isn't this a red flag? I know it sounded weird to me when our college pastor had a sermon about this. However, most of my former Christian friends embrace this with all their hearts. They even include the caption "saved by grace" on their social media profiles. It's truly amazing to me that hundreds of people believe they need saving from their inward depravity because of a book written by non-eyewitnesses decades after the supposed events occurred. It's truly baffling to me. Even the concept of asking God to forgive me for my sins is bizarre.