Interesting read, but I want to raise some objections:
1) I don't like that one keep talking about the whole west as one unit and tainting everybody. It creates a simplified picture of oppressor and the oppressed.

It should not be forgotten that this is primarily about the major powers of Europe. Not every European country was a major power. Europe is full of smaller countries, which often had little say in this matter. Ireland e.g. has a brutal history of oppression by the British. It is not like whites were nice to each other and only cruel to others.

Big colonial powers have a different view of people. I remember reading about polar expeditions, naturally since I am Norwegian. It is hard to not notice the stark difference between how Norwegians treated Inuit people and how the British treated them. The British were full of contempt for the natives of the polar regions. They viewed them as backwards and as having nothing useful to teach them. The British assumed British sense of civilization, property law etc was universal. When an Inuit took an object belonging to a British expedition member they brutally flogged him as punishment for "stealing". Never mind that the concept of ownership was entirely different to the Inuit.

Norwegian polar explorers in contrast eagerly learned from the natives how they used their dogs and how they dressed for the cold. It is a probably the chief reason why Amundsen would beat Scott to the pole. Amundsen did not deal with the different culture of the Inuit by assuming superiority and doling out cruel punishment to anyone not following his moral code. Instead they used trickery, making the Inuit believe that if they went into their storage room, they could blow up.

I am not writing this primarily to make my fellow Norwegians look amazing. But it is easier to contrast with cultures you actually know. Anyway we were kind of dicks to our indigenous people, the Sami, but to point out that European culture varied greatly. Saying the west did this and that, is a bit like our own homogenization of Africa, as if it is just one country.

2) We must know our history to not repeat it. I DO think it is a problem that we often try to sugarcoat our past. However we should also keep perspective. Too often people get into this pattern of thinking as if the past brutality of European colonial powers is inherent in being white. That is just as racist as claiming jews are inherently money grubbing bankers and africans are lazy. Europeans are as much product of their history and upbringing as everybody else, and has the same potential for change. Nor is everybody the same. While Europeans enslaved people, there was also Europeans fighting hard against slavery. Emancipation developed further and quicker in Europe than in many other parts of the world. E.g. slavery was ended by Europeans before it was in the Arab world. I don't think that points to white superiority, but simply is a way of pointing out that every civilization is a mix of different values and ideas, both good and bad. The good can triumph over the bad.

We should however recognize that the struggles many countries face around the world is partly of our making. However we cannot take full responsibility. Africa or India would not be as modern rich or developed today as by magic if Europeans had never set their feet on shore. All of these areas were hundreds of years behind Europe in technological development. What Europe could have done is treating them better. But that does not make Europeans uniquely bad. The powerful have always through history had a tendency to exploit the weaker ones.