I honestly don't think for a minute the majority of them thought that,or anything else about Westerfield. To them,it was all about the parents being "swingers"and they wanted them punished for this. They didn't and don't give a damn about a little girl being murdered because they had a more serious offense on their alleged minds,"sex". This is the same group of people who were more outraged about Bubba-1 getting blow jobs than they were about treason and all the other actual crimes he comitted.
Oh I agree with you that many of Westerfield's defenders were more obsessed with the parents sexual and drug activities than they were in the facts of the case. I wouldn't be suprised if a few of these nuts believe that Westerfield was the avenging angel of God and brutalized and murdered that couples little girl to smite them for their sins.
These people just want to cling to anything or deny anything to hold onto their narrow world view. Bad things happen to bad people, and bad people do bad things. In their minds eye, the VD's were bad people, and they did bad things.. therefor the bad thing.. the death of their daughter was somehow their fault... not the sick sadistic animal who committed the crime, but the parents fault. Westerfield doesn't look evil.. so he can't have done it. They stare evil right in the face and refuse to accept what they see.
No one is going to put the VD's up as parents of the year, but it is ludicrous to claim their actions caused their daughters demise. Westerfield did that, and mercifully he will never have the opportunity to do it again. May God have mercy on his soul, because he will get and deserves no quarter on earth.