Complex sentence: Josephus reports that Jannaeus brought 800 rebels to Jerusalem and had them crucified, and had the throats of the rebel's wives and children cut before their eyes as Jannaeus ate with his concubines.
Split into simpler sentences: Josephus reports that Jannaeus brought 800 rebels to Jerusalem and had them crucified. Even worse, Jannaeus had the throats of the rebel's wives and children cut before their eyes as Jannaeus ate with his concubines.