To be fair, a majority of the native population died due to the Europeans inadvertently introducing Smallpox. While I agree with your argument as a whole, I would advise against trying to use numerical arguments for Europe's treatment of the natives.

> inadvertently introducing

Not always inadvertently, perhaps:

https://www.history.com/news/colonists-native-americans-smal...

Although that article says that "there’s only one clearly documented instance of a colonial attempt to spread smallpox", the fact that there is any "clearly documented instance" of such an attempt is pretty horrific.

I interpreted their argument to mean that the Native Americans were 100% of the American population before Europeans arrived.