There are generally two reasons why they feel like that. 1. Someone has actually mistreated them and they have every right to feel that way. People are dicks to one another and there are nationalist pricks who like to be mean. I've got no problem with this case. 2. Then there are Russians who have chauvinist ambitions and think that everyone owes them respect as they represent Great Russia which won the war against the Nazis and Latvians/Estonians/... have no business asking them to know the local language, respect local customs and they will go the extra step to be dicks to us. And here's the kicker - "real" Russians from Russia don't really count them as the genuine article which makes them extra salty as they don't really belong anywhere. Our country is taking in Ukrainian war refugees and we are seeing ethnic tensions rise between local putinists (of every stripe, not just Russian). Actually the most fervent support for putinism comes from mixed families as they have more pronounced identity problems and thus they really deepthroat whatever Roskomnadzor throws their way. Unsurprisingly there is a great deal of overlap between the local antivax guard and pro-putinism as disenfranchised groups tend to be contrarian and oppose anything the government is doing. Some local populist figures have gone silent as the Kremlin has stopped financing them. In any case it does seem like this war is creating a more unified EU and I feel like there's more unity between Latvians as well. With the influx of Ukrainians we will have more allies to weed out Russian chauvinists or at least marginalize them. Some pro-Russian political parties have been forced to choose sides and they are constantly losing voters. Only one party has increased in popularity as it has sucked up all hardline putinists. It will be an interesting election this summer.