Complex sentence: Tom fights relentlessly with Jake's father about going and when they leave for a Sharing meeting together Jake fears that Tom may force their dad into involuntary Yeerk infestation, or even kill him.
Split into simpler sentences: Tom fights relentlessly with Jake's father about going. When they leave for a Sharing meeting together, Jake fears that Tom may force their dad into involuntary Yeerk infestation or even kill him.