[Genoa]

Did the army of Titus deliver to the Lord the vineyard’s fruits in their seasons?

No. "A nation bringing forth the fruits thereof" refers to those Israelites (with faithful Gentiles grafted in) who are the faithful in God's kingdom (either now in its incipient phase, or later in its fullness). Israel lost the land to Rome, and their spiritual status to those who would accept Messiah. But the point is that it won't always be that way. God will have them back. Read Romans 11.

[Romulus]

"A nation bringing forth the fruits thereof" refers to those Israelites (with faithful Gentiles grafted in) who are the faithful in God's kingdom (either now in its incipient phase, or later in its fullness).

Let me help you out. It refers to the Church, the body of believers with Jesus at their head. Unbaptized Jews do not belong to this body.

But when the king came in to see the guests, he noticed a man there who was not wearing wedding clothes. ‘Friend,’ he asked, ‘how did you get in here without wedding clothes?’ The man was speechless. Then the king told the attendants, ‘Tie him hand and foot, and throw him outside, into the darkness, where there will be weeping and gnashing of teeth.’

At the Second Coming, Israel will receive a special grace in the final opportunity to recognize and acknowledge her Lord. That is the meaning of Romans 11. But no one is saved against his will; no one's marched into heaven at gunpoint: the Jews who reject Jesus on the last day will receive what they desire -- separation from him forever.