Malachi's prophecy wasn't about Jesus and John the Baptist?
They are applicable to all Messengers, thus in spiritual terms John and Christ fulfilled that prophecy, but not materially.
Christ gave prophecy yet to come about the great and dreadful 'Day of the Lord'.
It is a big topic but this is that Great and dreadful 'Day of the Lord'.
As for your other post, no one should ever becone a Baha'i if they do not want to and are not prepared to accept great change and that first happens in ones own self.
This is a great day, but dreadful for the self that is not of God. As you have said and people have noted about Baha'i numbers, few take up the challenge. Many are called, few are chosen.
Does that not prove why a great day is also a dreadful day?
Regards Tony