Not teaching the local language in schools, to instead force them to use your own is denying it and it is genocide.

Go to China and look at how they are wiping our local ethnicity through exactly that, they are forcing generations to grow up learning Mandarin in schools, legislating that TV must be in Mandarin, etc. and through this they are causing languages like Cantonese to lose their daily usage and thus die off.

It's what a large swathe of Europe did during the 19th and 20th century, where local languages (and their corresponding cultures) were basically killed, e.g. everyone in France basically speaks Parisian France, with only Brittany holding out its culture.

Seems like genocide is not all that horrific in your view.

This is revolting to hear anyone say.