Garth posted a comment earlier today, asking for some reading material to further explain the health benefits of cholesterol and the potential cancerous effects of polyunsaturated fats.

First, find a copy of The Cholesterol Myths by Uffe Ravnskov and give it a good read. Not only does it cover the topic of cholesterol, but it also gives one a better understanding of polyunsaturated fats. I'm flipping through my copy while typing this and chapters 6 and 7 both thoroughly cover the cancerous polyunsaturated fat.

In addition to that book, here are a few links to get you started:
Dr. Groves
Ray Peat
More Ray Peat

Finally, if you want to try your hand at digging up the studies themselves, head on over to: pubmed.

To summarize, cholesterol is required of all cells in your body. Cholesterol gives cells their rigidity. Without any cholesterol, you would be a big pile of goop on the floor. On the contrary, polyunsaturated fats are highly unstable and weaken the integrity of our cells, thus suppressing our immune system's ability to protect us against the daily attack that we are under.