The legacy of the UK is certainly not generally looked at in the same light as similarly evil 20th century regimes. (Nor is the US)

The reason has more to do with the fact that victors write history, and the Empire co-opted and exploited local institutions. So while Britain’s Empire was lost, its language and cultural impact reigns supreme in many ways to this day.

The claim seemed to be that historical British crimes were disproportionately ignored, compared to historical crimes committed by other countries. I am arguing against this by pointing to other crimes that (I'm guessing) most Westerners don't even know about.

The Mughal empire mistreating Indians has a slightly different relevance to Westerners than some Western empire doing the same.

Not knowing about Mughal is ignorance, while not learning about the bad sides of our own history is (often: culturally imposed) revisionism.