I read the Manifesto and it's a pretty painful thing to read... the guy is so extremely full of himself, every page from beginning to end oozes extreme narcissism. It's not so much a Manifesto as it is a badly written autobiography, from his birth to right before he died, describing his life with the painfully detailed style of a special individual. His life is not at all bad; he travels the world from a young age, his mother used to date George Lucas and gets little Elliot (a huge Star Wars fan) to see a Star Wars movie premier and meet his favorite actors. He watches a lot of movies, old and new, and when he's a teenager and he's misbehaving quite a bit, his father decides to send him to Marocco with his stepmother, who's from there. They stay in an ancient Kashba that was used to shoot a James Bond movie. Pretty awesome, right? Yet all Elliot does is complain about the heat, the humidity, the food... he sees the negativity in everything, and nothing is ever good enough for him.
His grandfather is "old and boring" to him, but a little research learns us that the man was one of the first to photograph several indegenous tribes and experience, first-hand, the liberation of several Nazi concentration camps. Elliot Rodger drinks the finest wines, meets movie stars, visits sets... his father, mother and stepmother have fascinating connections, his grandparents have amazing stories to tell. And yet all he does is whine and cry about his lack of popularity. At the same time, he flat out refuses to hang out with the kids he sees as "not cool", and desperately tries to be accepted by the in-crowd. They pick up skating? He picks up skating. Blonde boy gets a girlfriend? Elliot dyes his hair blonde. The story reads as a frustrated little boy's diary, and that tone never changes... he wants to come across as this worldy intellectual, sipping wine and taking long walks through nature while pondering on the tragedy of life, but all he manages to do is come across as a perpetual whiny, spoiled child.
Only at the very end, "My Twisted World" stops being a faggy try-hard Mean Girls' style diary and becomes an actual Manifesto... but it's very half-assed. The main idea is that women suck and men ought to be in charge of them. Women choose "bad boys" over "good men" like Elliot, therefore they should be treated like cattle and devided among good men. They should be bred artificially because "sex is immoral and brings out the worst in people". The world will be lead by one Supreme Leader (Elliot). Then he goes full Tolkien... he wants to reside in a gigantic tower and, from his high and mighty Sauron-like dwelling, oversee all of humanity and ensure they "do the right thing".
Elliot then details his plans for his intended mass murder, and muses about whether or not he will be able to kill his stepmother and half-brother. He says he could probably kill them without remorse, but would be unable to kill his father because part of him still looks up to him for "being an alpha man who can get women easily". Then the diary\manifesto stops rather abruptly... he uploads his videos, mails his writings to his mother, therapist and family, and stabs to death his roommates shortly after he finishes writing.
It's not a good read, but it's very insightful in the way people like him think and operate. The mindset Elliot has is common among wizards, loveshies, "sluthate" people, PUAs, MRAs, 'incels' and other losers. The weird thing though, is that Elliot had by far the best chance of success, the best connection, the richest family, the most interesting background. He was educated, he was wealthy, he was well-traveled. And yet he cultivated a toxic mindset, undoubtedly worsened by his contact with various toxic online communities, that ended up leading to his death and those of many innocents.
And that man is these people's greatest hero. The whiniest, faggiest, douchiest motherfucker that ever lived. The guy with the world's most punchable face. He's an inspiration, almost a saint, to these people. That tells you all you need to know about SlutHate and their memberbase.