I wonder how the humankind is supposed to avoid repeating the history if it's afraid to look at it?

Someone is very interested in averting people from knowing it in detail, and most people play along self-censoring.

I didn't want to look it up because it is more interesting in engaging with other people. If I looked it up I would immediately know if I was right or wrong and wouldn't have even bothered looking at your reply.

I agree with you it is worth looking at history.