Translation of injusticia

I understood that this was a real problem in this country and many foreigners came for sex tourism. Many bad stories had happened but my hosts were decent people. I could tell that right away.
Usually in a place with a homegenous society hatred towards foreigners can grow much more easy as a small disturbance to the homogenity may upset the entire society. People are not used to changes.
We shared a cabin with an elderly couple from Spain. They started blablaing about Spain, about their corrupt government and about their civil war. They should not work in PR, advertisement or sales.