The Importance of Luke 2334 in the Calvinist Tradition

In luke 2334 jesus said father forgive them for they know not what they do this of course all words from the cross i have several questions. Who are these people that jesus interceded for the authorities that put him to death the jewish world the whole world were these people forgiven and if they need to repent to be forgiven then what was the importance of jesus's words for these people? I think in a sense he thought he was writing something that we would call scripture is that scripture is multivalent once you get the original meaning here are these roman soldiers nailing into the cross then you can see resonances out beyondThat phrase has been hugely powerful