Before discussing the dark ages further please read the following story.
This is to show that we are not attacking people belonging to any particular group, or organisation, or religion.
Sometimes things that happen in the past by an organisation, religious group or country, when reviewed in the historical context, are not very complimentary to that group. It does not mean the people in that group today are bad.
Eg. The way the early settlers in the USA treated native Americans, or how they treated slaves, was pretty despicable. That doesn’t mean all citizens of USA today are bad.
Likewise, the way early Australians treated aborigines is pretty horrible. That does not make all Australians today bad people.
Many groups have periods in their past they are not proud of.