Complex sentence: To do so would have violated the most fundamental condition for the troupe's and its members'survival, as life in Westerbork was dominated by the persistent threat of deportation on the next transport to an unknown but deeply feared fate in the East.
Split into simpler sentences: To do so would have violated the most fundamental condition for the troupe's continued existence. Besides, life in Westerbork was dominated by the persistent threat of deportation on the next transport to an unknown but deeply feared fate in the East.