Whats this got to do with a tendency to violence. Here is your theory: Jeremy didn't have a tendency for violence. But he didn't need to have in order to have committed the murders. But on the other hand Sheila didn't have a tendency for violence therefore she couldn't have done the murders.
So what do we have according to your theory. A person doesn't need to have a tendency for murder to be a murderer. On the other hand Sheila didn't have a tendency for violence therefore she couldn't have done it. Why on earth did you introduce this argument in the first place if it makes no difference if a person has a tendency for violence or not. Furthermore why are you arguing your pants off trying to prove that Sheila was a really ok person and was a very stable character in fact.
Forgive me (this is not an apology) but why are ytou arguing BS? 
You are the one arguing BS not me. You always pick strawmen because you can't ever actually succesfuly challenge my actual arguments.
"But on the other hand Sheila didn't have a tendency for violence therefore she couldn't have done the murders."
That's not my argument. The longest posts on this board contain my arguments of why he is guilty and the evidence that supports my arguments. That wa snot among them. The fact Sheila had no tendency for violence is one of the MANY reasons why it is unlikely she would commit such a crime. I never argued that proves she didn't do it.
My evidence that she didn't kill anyone else it is that the killer installed the moderator and used it, obtained at least 5 bullets from the gun closet to use if not entirely using bullets from the closet, loaded the gun to capacity (11 rounds) firing all of them at the parents in the bedroom, wore gloves, had to have been covered in victim back spatter and GSR and landed 25 of 25 rounds therefore had to be skilled with the gun.
Sheila had never used a semi-auto before and in fact was not known to have ever used any guns, she would not have known she needed to chamber a round before firing the gun let alone knew how to do so and would not have known how to load 11 rounds let alone bothered to do so and she had hand eye-coordination problems so would not have landed all rounds she fired. She would not have gone to the closet to get the moderator to install and would not have used 20 rounds from the kitchen but ran to the closet to get 5 more when there were still 30 left. The bullets in the kitchen were clearly staged there by Jeremy. She would not have had any reason to use gloves but if she were the killer she would have and the gloves would have been found by police and her clothes would have been covere din blood/GSR. Sh would have had no reaosn to wash and change before killing herself but if she had done the unlikely then her blouse, nightdress or whatever she wore on her upper body that was stained with blood and GSR would have been found. The fact no such clothing or gloves were at WHF means she cna't have killed anyone. Nor could she have killed herself because after she was dead the killer removed the moderator and put it away in the closet, moved her blody flat and opened and closed the bible in a pool of her wet blood that formed after she died.
That is why Sheila can't have done it not because she didn't have a history of violence.
Since you can't dent my actual argument which is multifaceted you create a simple strawman that I never argued.
Since she can't have done it who did? That is where all the evidence against Jeremy comes in from him pretending he got a phone call from Nevill, his alleged reactions to that call which made no sense, to removing the scope in anticipation fo the murders, to staging the bullets in the kitchen, to hiding the phone to all his documented lies aimed at framing Sheila to, his various lies to police and changing story to telling Julie of his plans beforehand and admitting he was repsonsible after.
The evidence against Jeremy is overwhelming. So overwhlming that for you to have even a remote chance of pretending he is innocent you have to ignore all the actual arguments and evidence presented and create simple strawmen.