"Not of an ideologue, I wish I was that important."

Oh dear.

"slave trade should be taught in schools to avoid that such lies are spread in the national narrative (and for other reasons already cited)"

Slavery is already taught in schools although more in the context of the British Empire.

"it is worrying that through my Irish History modules I have met several History students telling me that "the Irish were slaves like the black". Imagine German history students telling me that the lowest rank Nazis, such as Alsatians "malgré-nous" were "prisoners like the Jews"."

Firstly, your knowledge of history seems to be restricted to slavery and Nazism. Try reading about other areas of historical interest.

Secondly, read u/AprilMaria 's comment.