Her objective was to get Kelly to make Nick suffer as much as possible, what Kenneth said or did to convince her to give away her neighbours details the specifics of which is something you'd have to query with G&K because they never showed us only her discussing her neighbours a minimum of four surrounding houses around Nick's house (you're more that welcome to hazard a guess of the number of people they killed in order for the verrat to occupy all those house). We know she wasn't under duress since she was cosying up Kenneth, as much as someone in her position would who was intending to destroy her former boyfriend by doing the unthinkable to get to his mother.
I think you sort of know this already, but for some reason you're choosing to ignore it. I get that you want to absolve Juliette for everything she did, she may not have pulled the trigger or ripped their throats or telepathically threw them up in the air and dropped them to their deaths or suffocate them or whatever was actually done to them, but she willingly participated in their murder as an accomplice/co conspirator or whatever that makes her liable through everything we saw her do with Kenneth.
Kenneth could have gone after the neighbours without Juliette but she chose to involve herself because she wanted to make Nick suffer. Why she involved the neighbours herself is something only she and the writers can answer.
I think you sort of know this already, but for some reason you're choosing to ignore it. I get that you want to absolve Juliette for everything she did, she may not have pulled the trigger or ripped their throats or telepathically threw them up in the air and dropped them to their deaths or suffocate them or whatever was actually done to them, but she willingly participated in their murder as an accomplice/co conspirator or whatever that makes her liable through everything we saw her do with Kenneth.
Kenneth could have gone after the neighbours without Juliette but she chose to involve herself because she wanted to make Nick suffer. Why she involved the neighbours herself is something only she and the writers can answer.