Complex sentence: As Vogel is feared by the other inmates and was born a Jew, something that the Brotherhood hates, he is a perfect target for them and is then found murdered hanging upside down in the gymnasium with the word "JEW" carved into his chest.
Split into simpler sentences: As Vogel is feared by the other inmates and is Jewish, he is a perfect target for them. Vogel was next found murdered-hanging upside down in the gymnasium with the word "JEW" carved into his chest.