Suppose historians establish:

A population was displaced.

That is a factual conclusion supported by evidence.

Researchers may then investigate deeper questions such as:

• Why did it occur?
• Who ordered it?
• Were there alternative policies?
• What were the immediate and long-term consequences?

Those are "deeper truths" in the sense of deeper historical explanations.

Whether the displacement should be remedied today is a different question involving law, politics, and ethics.