[Romulus]

Did the army of Titus deliver to the Lord the vineyard’s fruits in their seasons? Is that what you believe?

[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.