I was a little confused at this one. They suggested it is the water supply that is making everyone sick. When Siddiq realized this, why did he just tell Rosita to go back to her room? Why wouldn't he say "Don't drink the water!". It seemed the water was tainted by the Whisperers, but was Dante doing something to the water system? Like bypassing water filters or something? And why did Dante have to kill Siddiq? I don't understand how anything could be traced back to him.