His Delightful Plant

Isaiah 5:7

For the vineyard of the LORD of hosts is the house of Israel
And the men of Judah His delightful plant
Thus He looked for justice, but behold, bloodshed;
For righteousness, but behold, a cry of distress.

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Following Isaiah's description about how the vineyard preciously
established did not bear much fruit, God is saying that the vineyard
identified the house of Israel and the people are the delightful
fruits/plants. So the house of Israel did not bring forth delightful
men. In fact, the righteous are full of distress while crying out to God.

I am wondering whether this passage applies to the churches in US where God
had sent His own Son to die for its establishment in order that these
churches would "produce" the delightful plants but rather they are busy
with something else and the few righteous men are crying out to God out of
distress.