The point is that they've been recognised in other ways and people aren't going after them.
And my point is, that’s a terrible argument in the context of statues.
Statues of people serve one purpose — to venerate the person being depicted.
The knowledge gained by the Nazis and Japanese during WWII is useful for saving lives today, even if the process of obtaining that knowledge was horrific. We should never forget the monsters who conducted those experiments, but we're not going to forget the things they discovered because of the way they discovered them.
Similarly, we're not going to scrap NASA and SpaceX because the Nazis developed rocket technology. The information is useful, hospitals are useful, missions to the moon and Mars are useful. A statue isn't useful.