It's understandable that the Baltic countries don't want to add to the Fifth column of fervent Putin supporters they already have under the minority Russian population inside their countries. The writing's been on the wall for months now and those Russians who only now realize that their support for the war could mean having to put money where their mouth is and cost personal sacrifice (instead of just sending those Buryats and Tuvans from impoverished far-away places to die) aren't the ones you want to have inside your borders. You can see it on telegram and VKontakte, those people are okay with the war and other people dying as long as they're not inconvenienced personally.