Except the intent is very much likely to wipe out other cultures here and not just to match grammar or pronunciation.

Honestly, this is a racist stereotype. A European person does something involving other cultures, therefore it must be an act of extermination. You're stereotyping everyone of European decent as a plundering imperialist.

Why assume malice when there are perfectly reasonable explanations? Specifically, the perfectly reasonable explanation of "to make the words pronounceable in the local tongue." Different languages have different structures and phonemes. Hell, some languages are tonal. Different languages have entirely different alphabets and pronunciation rules.

If there is a major historical figure whose name originates from a foreign culture, you'll still want to talk about that person. However, very few people will be able to correctly pronounce the name. So, what every culture does, what every culture has always done, is to give historical figures a local name appropriate to the local language.

This is something humans have been doing since the dawn of time. Hell, living people do it today. Immigrants often pick a local name when locals can't pronounce their name properly. And this happens in both directions. People coming to western countries often adopt local names, and westerners often adopt local names when moving to other countries.

This is something humans have been doing for tens of thousands of years. But no, go ahead and make some racist assumption about it being some evil thing those evil white people do.

Racial stereotyping isn't cool, regardless of who you're stereotyping.