You can call it "speaking for God" if you like but I'd call it Christianity 101.
Christianity 101 has nothing in it about death beig in "God's plan at this point" (If I recall your original words correctly). When I read what you wrote, it appeared that you were saying that God wanted this boy dead - or perhaps you were speaking of Terri Schiavo?
If you are referring to the natural order being the eventual death of this human shell - you are correct. but the way it was stated led me to believe you were claiming to know the mind of God - which is decidedly unbiblical.