Perhaps witness, you should properly grieve for the loss of your younger brother, instead of using his death to advance your criticism of a Christian congregation and a letter.
If you, already know, how the majority of Christendom thinks about heaven, which is a false ideology according to scripture, there is no need to project in such a sensitive time.
That goes for JW’s to. Don’t pile on. It’s beneath us all as imperfect humans to bolster our imperfection at this time.
My condolences for your lose!