Technically you don’t need to go to church. Going to church is a very small almost insignificant part of it. The root of Christianity is to accept the blood of Christ and his body as our saving sacrifice. The believe without proof of this sacrifice guarantees the cleansing of our sin and we are made clean before all mighty God. Jesus Christ is not our executioner, he is our salvation. God is judge and his Angels will be the ones doing the punishment and waging war for his glory.