The present tense vs. the relatively distant past actually is (or at least, it should be, imho) a significant difference to our current acts. The USA's meddling in south- and middle-american affairs (such as, Allende's ‘suicide’ — he apparently shot him self in the back, with a machine gun, from a 15-feet distance; the active support for the Nicaraguan death squads, etc. etc.) in the near past still is viscerally horrible to me, as are the native american genocides of the 19th century (which many claim to be still ongoing, even accelerating under the current regime). Even the Tian-an-men massacre, at this point, is history.
What's done is done and cannot be undone. Which is an altogether different story from what's happening now. That of course includes the current atrocities in North Korea, in Kurdistan, Yemen, and the pending ‘great breaking of bones’ bloodbath that looms threateningly over Hong Kong. It certainly includes the Uygur ethnic cleansing, which is taking place right before our very eyes. At this moment in time, not in the distant or even near past. A wrong in the past does not make a right in the present, no matter what, in any case.
We may feel we should keep politics out of sports. We can't, where sports are being used to push political agendas. We can close our eyes, of course, but not without making ourselves complicit to that scheme.