space I don't think that the murder had anything to do with Tate, Fox, Trump, Robinson or right wing influencers.
I think you're dealing with 2 kids who have, for whatever reason, lost all sense of reality. It seems that the girl has been the driving force, and the lad has willingly gone along with it. The girl was regularly downloading and viewing murder & torture videos of the dark web.
If you read the reports, the girl had previously tried to poison someone at another school, tried to poison the lass that they eventually killed, had created a 5 person kill list and post arrest has been found to have created another 3 person kill list of carers, nurses, etc. She/he/they haven't formulated a manifesto and tried to implement it; they've lost all sense of reality. The trans gender element wasn't the driving force behind the murder, but it is an easier 'fit' to explain what happened, rather than admitting/having to explain why we as a society are producing 16-17 year old psychopaths.
From The Guardian:
"Ratcliffe has denied being motivated by a hatred of trans people, despite using transphobic language as he and Jenkinson planned the murder.
Littler admitted Ratcliffe’s language was offensive but said the crime was not motivated by transphobia. After all, he said, Ratcliffe appeared willing to help Jenkinson murder others on her kill list, all of whom were boys. “Ironically, worse for Eddie, it would appear from the messages that Eddie would have helped Scarlett irrespective of the gender,” Littler said."