"We should kill all the Russians in Ukraine" -> "We should kill all the Russians invading Ukraine." is probably the right phrasing for the question I was asking.
You might want to switch to just 'Ukraine' without the 'the' when referring to the country. 'The Ukraine' is an outdated way of referring to the region without conceding that is also a valid and sovereign nation. Since the invasion this term has taken on further connotations.
"We should kill all the Russians in Ukraine" -> "We should kill all the Russians invading Ukraine." is probably the right phrasing for the question I was asking.