No, no, let's rewind a bit. For the sake of argument, let's forget about nations for a while; I have all of mankind in view. The crime of mankind is not misinterpretation of a book alone; it's rebellion against God. That's a whole separate discussion, but for now I'll assume that that's the action and it deserves death. If we are taking the Bible's POV, it's quite clear that all of mankind has taken part in that rebellion (even when it hit the Israelite authors themselves very hard - have a read of the opening chapters of Isaiah, for instance, where God is lamenting the sin of Israel and pronouncing judgement on them).
Again, genocide? Well, we do believe in a justice system. Many Western justice systems (like the current Australian one, which I know well enough to talk about a little) will not inflict the death penalty as a throwback to the Christian foundation of death being a punishment that only God ought to inflict. However, suppose that man did have the right (and indeed, the responsibility) to inflict death on those who were guilty of crime. This punishment is not good in itself but good because it protects and ensures the safety of others. If several people are guilty, then we have no qualms with pronouncing justice on all of them. What if the whole world were guilty? Then, I would say that death would be deserved by the whole world.
