When God kills a man is that equal to a man killing a man. When a man does it he cannot undo it, what he kills says dead. Man never kills something he created as he himself is a created being.
Has God killed anybody that would be alive today had He not done so. No, that last Scripture was written over 1900 years ago. It is a rarity for somebody these days to reach over 100. They are dead and did God kill them. In a way because when He gave man life He also had a mechanism in place that would take that life away. God didn't cause that mechanism to be put in motion, Satan did. How many people have lived (inside and outside the Bible) that died without God being directly involved (as per all the instances in Scripture). Is Satan going to undo any of that? No, it will get worse. God can and does bring people back from death, both those who He caused to die directly and all the others who died indirectly. By making sure all man has died so far He has kept His word, eat and you shall die is accomplished via the breath of life leaving the living soul.
Trust me, this God is one that you will really want to stick to the script He has already written. Any variation would mean you turn your back on Him because what is being shown you is a deception.
Nor should He repent anything not yet accomplished, the really bad parts that He does is on the ones that are very, very bad. That is done in the last portion of 1 single day. death toll is 2/3 of the living remnant of mankind, the other 1/3 are the first gathered to immortal life. In the previous 1110 days 1/3 of man is killed via satanic angels, the men that assist this fallen army are a separate group from the 2/3,
So far you have Christ killing 2x as many in just a few hours compared to a smaller number over a much longer period, who is stronger?
Satan is finished, his next appearance is his trip to the Lake. After that all those who are not already immortal are brought back to life by God Himself, that would certainly include any He had killed in the OT (actually, because He did do they are most likely one of the first granted immortality and a just heart.
So, how do you conclude that He is breaking His word?
He is already obeying His own Law, He has to keep taking the breath of live from everybody, old age most likely the preferred as He capped that at 120. You are bitching at somebody for doing what they said they would do. That is a more admiral trait than saying you will do something and then doing nothing, or like your example, the opposite. Isn't that how some people dissect political speeches.
A previous post say men can fight for God. If you actually harm somebody in that war, that is what God will do to you, maybe even more so in that He can follow you past death, we can't.
I could provide a verse that states if you support someone in some way and they kill somebody 'for God', when God comes to correct that anybody involved in any part of how that event took place is just as guilty. That is why the army that comes against Christ does not have to be that number, those that are any help are living carelessly.
Which of the above would you hang Him for first?