A young woman named as an object of hatred in the California mass killer's manifesto this week is devastated, according to her father.

Monette Moio had been a childhood schoolmate of killer Elliot Rodger, 22, who stabbed three friends to death and shot three other university students on Friday before taking his own life.

The rampage in Isla Vista, near Santa Barbara, was preceded by videos and a long manifesto in which the killer ranted against women in general and specific women who were the target of his anger and years of sexual frustration.

The killer had been diagnosed with Asperger's Syndrome and was being overseen by health professionals.

He had also been checked on by Santa Barbara police last month following a tip-off but managed to dissuade officers that he was a danger to anyone.

The woman reportedly behind the "evil manifesto" was a childhood friend of Elliot Rodger. Photo: Facebook

Rodger, son of Hollywood director Peter Rodger, wrote that he feared the police would discover the cache of weapons and bullets hidden in his room and arrest him.

Ms Moio's father says his daughter, named by the killer as his one-time crush, barely remembers him despite his accusations that she was an "evil b..." who "teased and ridiculed" him, The Daily Mail reports.

Ms Moio's father John says the dead killer's claims were ridiculous and that his daughter had not seen him since she was 10.

Other women who had either been friends or objects of the killer's crushes, were also named in the rants.

A backlash against not just the killer's violence but misogyny has gathered momentum in social media since the killings.

The hashtag #YesAllWomen was launched to allow women to share stories of misogyny in the wake of the assault on Friday in Isla Vista, near Santa Barbara, which saw him kill six people before taking his own life.

The Santa Barbara tragedy has also provoked questions over America's gun laws and shooting culture.

Richard Martinez, whose son Christopher died in the attack, slammed lawmakers and the gun lobby after the tragedy.

"Why did Chris die? Chris died because of craven, irresponsible politicians and the NRA," Martinez said, raising his voice.

"They talk about gun rights. What about Chris's right to live? When will this insanity stop?"

Elliot Rodger killed six people before he turned the gun on himself. Photo: Facebook

The West Australian

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