The denial from some that it's a bad thing is very bizarre however, as is the outcry of National Trust explaining where people got their wealth from, as one example. Why hide it? It happened, there's no denying that.
Let's face it, all through time people don't get well off by being nice and benevolant to their neighbours, do they! If it's not slave plantations, it's exploitation of the working class, the enclosure of farmland, etc etc. It astonishes me that people are astonished by the revelation that generous benefactors weren't all sweetness and light!
Now that of course doesn't automatically make them bad people, as they may well have been part of their time period etc. and good people can do bad things, as much as bad people can do good things - it doesn't have to be just black and white. I can perfectly well enjoy going round a historic building and enjoying the craftmanship even if I know that said work was done by being dastardly to some people!
But to deny it that empire was probably bad is bizarre in the extreme.
(And yes, we can even then explain that the British version was actually one of the more benign empires in history, and did often advance nations and peoples in technology etc in ways that wouldn't otherwise have happened).
I mean, I dunno if it's moved on, but my GCSE History was about Empire, WW1, and how competing powers looking for world supremecy then ended up dragging in ordinary people for a pointless war - it's not even a new thing to say Empire is bad, so why are we politicising such a thing!