Luke 6.32: “If you love those who love you, what benefit is that to you? For even sinners love those who love them.”

Jesus knew that everyone was evil (except him) and that everyone sinned. Nevertheless, he used the term “sinner” for an identifiable class, just like the Pharisees. (Matthew, Mark, and Luke do the same as narrators.)

When the Pharisees objected to fellowhip with sinners, they were not claiming that they never sinned.