Ungrammatical!
Regards,
>> who not whom
Quite some time ago, I once used ‘whom’ in the subjective. I recall the accusation of being a pretentious jackass. To this day, I fight the temptation to use it.
The rule, which I just reviewed, states that ‘whom’ is acceptable as the object of a verb or preposition.
That’s fine... but ‘who have died’ vs ‘who died’ is for me the real struggle — lol.
The subject is “who”, therefore “whom” is not correct in this application.
The preface “all those” = “who”
“All those who” is a compound subjective pronoun. It is awkward writing. Shortened, it would be “all who died”, or “those who died”, but the subjective pronoun is still “who”, not “whom”. “Whom” is never a subjective pronoun
Example..
“Bob is he who played first base”
Presented for your edification.
...that is all