When was the last time someone sinned against you?
It can be a harsh and perplexing reality, but in his divine wisdom, God has chosen to keep us in a world populated with flawed individuals. There's no covenant promise that includes an exemption clause from being sinned against. In fact, Jesus predicted just the opposite! (See Matthew 18:15, Luke 17:4, and John 16:33)
Many times, these sins will be indirect, impersonal, or unintentional, the natural result of colliding sinners. But...