Finally Free,
People die all the time because of what Eve and then Adam did much more than to just 3 & 4 generations. Why are you not unhappy with them? Our eyes are now OPEN as a result of this conflict. My great grandmother joined the WT in the 20's. I am the 4th generation down that was "punished". My kids, (the 5th) will be the first to be free of the WT. People are affected by the choices their ancestors make all the time. Choices equal consequences, naturally.
What exactly did God mean by that... don't really know exactly. What I do know is that if he killed all of them (PREMATURELY) he'd be completely justified because all break God's laws, and are extremely prone to doing so. None are innocent. This is the false premise that all unbelief is based upon.
God offered a deal to commute the death sentence that we inherit as a result of our transgression. Israel wisely accepted. Moses mediated that agreement. Under that arrangement, sins just didn't get automatically forgiven. The priest and then the sinner had to place their hand on the head of a bull or lamb and transfer the sin onto the animal. Then the animal was slaughtered to kill off the sin. It was a bloody, messy ordeal. However, lots of Israelites are in heaven right now because they followed the instructions. It's much easier for gentiles with Jesus as Mediator.
If you could follow God laws, or even your own, or even just refrain from judging others, you would not be under a death sentence at all. Since you cannot, you are on death row already, and so is everyone else. As condemned criminals.... we have no rights. There is no authority or justice to make appeal to. There is only mercy.