God DOES NOT kill. Killing is done by those who CANNOT give that life back again. Jehovah does not kill, he simply takes away the lives of people who are disobedient but he has the ability to grant them life & restore life to them again if he wants to!
Do I remember right that there's no coming back from the second death?
Rev 21:8 (NWT): But as for the cowards and those without faith and those who are disgusting in their filth and murderer and the sexually immoral and those practicing spiritism and idolaters and all the liars, their portion will be in the lake that burns with fire and sulfur. This means the second death.”
That's pretty much everyone, so I'm not sure if that technicality is technically right.