Yes, the common teachings of "Christianity" allow for the worshipper's performance of evil. Years ago, the mafia was one of the largest financial contributors to the Catholic church. It is the Catholic doctrine about their weekly visit to the "confessional" that allows continued/repeated acts of evil with no loss of God's grace, but even in the Protestant faith/devotion, many worshippers continue to do evil deeds as a habit.
After two thousand years, "Christianity" should have PROGRESSED in beliefs, understanding, habits, and day to day devotion, but there had really been no break through's or milestones except the German priest Martin Luther (if that could be called "PROGRESS").
We look at scripture and SEE (always seeing, but never understanding)…..Mark 13:14 and Isaiah 6:9.