how did ishmael portray psychological violence in the rehabilitation?

While in the Benin Home Ishmael describes a typical raid.

“Whenever I turned on the tap water, all I could see was blood gushing out. I would stare at it until it looked like water before drinking or taking a shower.”

Ishamel describes what it was like to dig their own graves.

“They fought under the soil with all their might. I heard them groan underneath as they fought for air.”