

The definition isn’t wrong, they just didn’t read it correctly. Those things in the UN convention are methods that could be used to “cause the destruction of a people”. They’re spelled out to avoid people misinterpreting the definition just like they did.
Russia isn’t in any way a threat to expand their invasion. If they could simultaneously invade Poland they wouldn’t be struggling so hard to reclaim their own territory, let alone conquer Ukraine. China is the one powerful and expansive enough to worry about.