Complex sentence: The accidental deaths of his wife and unborn child were a devastating blow to Holt because he considered himself responsible for the accident as he made his wife late for church by arguing with her about the value of religion.
Split into simpler sentences: The accidental deaths of his wife and unborn child are a devastating blow to Holt. He considers himself responsible for the accident as he made his wife late for church by arguing with her about the value of religion.