Like a control circuit only able to correct the system in one direction, it will drift in that direction without limit. It turns history first to myth, then to fairy tale.
(Interestingly that article starts with mention of the massacre of Namibians by Germans. I don't think anyone is being "cancelled" over that, possibly because everyone involved was "cancelled" a lot harder in the middle of the 20th century for some reason)
We tightly strapped an infant to a traditional plastic “circumstraint” using Velcro restraints. We also completely immobilized the infant’s head using standard surgical tape. The entire apparatus was then introduced into the MRI chamber. Since no metal objects could be used because of the high magnetic fields, the doctor who performed the surgery used a plastic bell with a sterilized obsidian bade to cut the foreskin. No anesthetic was used.
What should be of no surprise to anyone, anywhere, is that people are deeply unmotivated to ever see the ends in a positive light if they were on the other end of that barrel full of evil means. Moreover, to say that someone should have pride in colonialism should translate to a tacit acknowledgement that colonialism was a great thing (if it's not great, why have pride in it at all?). And if it's a great thing why shouldn't we do it again?
I mean, does anyone genuinely think any value the Nazis produced would make up for the enormity of their evil? Should Germans have pride in Nazis because they helped pioneer rocketry?
To give a simple example, the question is "Did the Umayyad caliphate bring new irrigation techniques to Spain? What was the overall balance between harm and benefit they brought to Spain's population?", and not "Do the new irrigation techniques justify their colonization of Spain?"
Somehow, we are able to dispassionately examine the harms and benefits when it comes to Islamic-ruled Spain. So why should we look at Britain's empire any differently?
"Then, in late November 2017, I published a column in The Times of London, in which I referred approvingly to Bruce Gilley’s controversial article ,'The Case for Colonialism,' and argued that we Britons have reason to feel pride as well as shame about our imperial past"
Neglecting what should be an obvious comment on Britons having pride in the results of colonialism (re: ends) despite the shame behind their ancestors' actions (re: means), the problem has never been related to how much evil benefits anyone. It's always been about how unnecessary evil is and the fact that there were always better options than evil.
For example, the Wikipedia article on a different colonial empire, the Umayyad caliphate, is positively aglow with all the good it did (in addition to enslaving some of its subjects): https://en.wikipedia.org/wiki/Al-Andalus
Same reason people aren't interested in objectively discussing the 'harms and benefits' the USSR brought to Poland[1].
Because there are people still alive who remember the occupation. A lot of them in fact. And the ones who weren't alive then are dealing with all the direct consequences thereof.
[1] Or of a Russian annexation of Crimea / the rest of Ukraine. Empires look kind of scary and nasty when you're on the receiving end of them.
Because it's politically useful to demonize their enemies, got it. In any case, if someone openly isn't interested in an objective view of history, then by definition they've confessed to wanting only propaganda.