This can only happen when there are organisations and individuals capable of investigating and exposing human rights abuses, inequality before the law, cover-ups etc. The most dangerous development in any so-called democracy is majority apathy regarding these matters. The people who cried: "Wir haben es nicht gewusst!" were the majority wilfully closing eyes and ears against human rights abuses. Some because they themselves were not directly affected, some because they believed the dehumanising propaganda directed at minorities, some because they were fearful.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: Israel's tyranny of the majority is dangerous