My only issue is that they referred to the past of the "Commonwealth" - they may have meant 'those countries in the Commonwealth" or the "Empire that went before the Commonwealth' but I can't see lots of evidence that the Commonwealth has had issues with racism itself, if anything I can see lots of evidence that the Commonwealth has tried to be a force for good in terms of racism and equal rights.
Of course there was serious racism and imperialism in the old Empire. That deserves being talked about in its own right but confusing the two doesn't help.
Very well said. That is precisely the point !