Fresh from His own corporate repentance, demanded it of them (Mark 1:15).
Specified repentance of Nineveh as model (Matthew 12:41).
Then lamented their refusal to repent (Matthew 23:13-38).
Why did they bear contemporary guilt for the murder committed 800 years earlier? (Matthew 23:34, 35). Only answer: corporate guilt.
National ruin result of national sin due to leadership rejection of call to national repentance (Acts 2:36; 3:14,15; Isaiah 9:16; COL 304, 305, 308; AA 247).