JW's don't kill outright today but that comparrison to how apostates should be viewed was given just a few years ago again. Maybe somebody here has the quote...
I do agree that the mindset is much the same. The absoluteness of their cutting off family members viewed as apostate is because they already consider them as dead and slain by Jehovah. It's a mindset that leads to depression and mental imbalance and for some JW's that see no other way, they do kill.
The Paris tragedy is at the far end of the spectrum but completely cutting off apostate family members is at the other end of the same spectrum IMO.