Irish immigrant slums in New York and London were once so problematic that police wouldn't go there unless in numbers. There were criminal/terrorist gangs who enacted their own law. The filth was quite notable. In the history, you can find parallels to many of today's issues. Also relevant: In the early 1800's, the typical Irish peasant had only 1/2 to 1/4th the wealth of the contemporaneous US slave!
Like most politically charged post-regime-change trials, the T&RC in South Africa is widely regarded by knowledgeable parties as mostly a sham/show trial. You can read more about this in e.g. R.W. Johnson's books such as [0].
For context, Johnson is a Rhodes Scholar, self-avowed communist, and longtime ANC sympathizer (since long before '91), which IMHO lends his few critical-of-ANC opinions mainstream credibility.
If you disagree with him for some reason, it's easy to find other observers who fit your political taste to corroborate his claims.
[0] https://www.amazon.com/Long-Will-South-Africa-Survive-ebook/...
My own background is Ireland, where the peace deal included an amnesty that has largely been respected. People from the same organisations that killed and tortured now walk the corridors of power joking with each other about who killed who's cousins; plenty of citizens aren't too happy about that, but twenty years of peace beats the alternatives.