Honestly I dont think JB did it. Its just a feeling
A feeling that requires ignoring the evidence in the case... People who believe Jeremy is innocent need to close their eyes to reality and make up nonsense to try to pretend it is possible for him to be innocent. That says volumes about whether he truly is innocent.
Since Jeremy supporters make up so much nonsense that is why people who think he is guilty make the effort to refute such lies and rubbish. If pro-Jeremy nonsense wasn't spewed there would be no opportunity to refute such but since it is spewed the opportunity to counter it exists.
If Jeremy is innocent then:
1) why didn't Sheila have blood of the victims on her, elevated lead levels from loading the bullets, GSR/soot on her hands and gown and have Nevill's blood on her body and gown? The killer would have had all of these things.
2) How could Sheila have killed herself with the rifle sans moderator and yet no blood to get inside the rifle and yet blood to be inside the moderator?
3) How could Sheila have died seated then after a short while move her own body flat and also to have
placed the Bible in a pool of blood that formed after she died?
4) How could Jeremy have taken out a full or near full box of ammo (47-50 rounds), 25 rounds from such box be used and yet 30 remain? Quiet clearly the bullets were staged after the murders- how could Jeremy have staged it after the murders unless he were the killer?
5) How could Jeremy have found the gun with the moderator and scope removed when it was routinely stored with them attached? Quite obviously he removed the scope in anticipation of the murders.
6) Why would Jeremy leave the bullets and gun out and why would Nevill and June not put them away knowing the twins were over?
7) Why would Jeremy have removed the bedroom phone to replace a perfectly good kitchen phone and then lie about it later unless he did it for the murders?
8 ) Why would Nevill try to phone Jeremy if Sheila was threatening him with a gun? He would either arm himself or dial 999 if he needed help.
9) The evidence proves the shooting started int he master bedroom with both Nevill and June being shot until the magazine was empty. Then Nevill and the killer went to the kitchen. How could Nevill have phoned before the shooting started when they were attacked in a room that had no phone and by the time he got to the kitchen he was injured and could not speak?
10) If Jeremy actually received a call from Nevill he would not have called Julie period he would have either rushed over or have called police. Calling Julie period gives away he didn't receive the call claimed but worse he lied about it and told police he immediately tried to call Nevill back then called the police and last called Julie. He would not have been able to call Nevill back though he would have to have waited for the phone to clear which would have taken a couple of minutes. If he were telling the truth he would have told police his phone would not work at first. 2 of Julie's roomates even insist the call came around 3AM so before the time Jeremy even claimed he received a call from Nevill.
11) Why would Sheila want to kill everyone she had no motive.
12) Sheila only had episodes when she was off her medication but she took her medication 3 weeks earlier and the injections last 6 weeks.
13) Sheila went to sleep early because her medication caused her to be tired a lot. It is a major tranquilizer and she was even diagnoses as being over medicated because of the symptoms witnesses described of her having problems communicating and being drowsy and vacant. What would make her wake up at 3AM and send her into an episode despite her medication?
14) WHy would Julie make up such a detailed account of him planning the murders and knowing he had no alibi why would she make up a claim he told her he hired a hitman? If she were going to make up something she would make up that he confessed to killing everyone himself.
Your feeling is based on little more than ridiculous biases you have including the refusal to face Jeremy's own lies and claims such as refusing to accept Jeremy's own assertions he could fit through the kitchen window. You mainly base your feelings on the notion he would not have shot Sheila a second time and instead would have fled and risked her surviving. Your feelings are not rational based and ignore all the evidence in the case.