Ukraine

Russians that wholeheartedly condemn what their country is doing probably aren't travelling that often to russia, for fear of being arrested. Thus, the ones regularly crossing the border are likely the ones that either support russia, or are suspiciously silent. Obviously, these are people we don't really want in the country anyway, because they're terrible people. That's before we bring in the security aspect of allowing russians that are supportive of a potential invasion of the country to stay in the country. Those people are a sabotage and intelligence risk.

Any russian that doesn't explicitly oppose the current russian regime is complicit. Even more so if they live in a country with free speech. There are plenty of videos online where you can see the preferred methods of dealing with russians engaged in invasions - why not extend the treatment to those supporting them?