Why did a moral god kill Nadad & Abihu?

[John V]

I'm not sure what passage you're referring to. Can you give the citation?

I'm referring to your post (evidently), not a particular passage in the bible (as though one requires a memory jog on all the instances where death is rained upon those who aren't in god's 'vogue' category at the time)

Also note that God did not impose the law on them. He offered it, with reward if obeyed and punishment if not, and they voluntarily accepted it.

In that case, you're either not reading well or being disingenuous, as I didn't say "horrible" or "everlasting."