Looks to me like he/she means that if you support killing people you are pro death. I don't think there's any hidden meaning in there.
I don't know. He doesn't seem to be denying it in post 153.
Those kind of comments really hurt me. My dad died in October after his feeding tube was removed. Terri's case is very close to my heart.
If you are interested, I have a short tribute to my dad on my profile page.