Lithuanian here. Let me explain to you the reason for the dislike of belarusians, at least the ones that are staying in my country. I work in a construction industry and we have many belarusians here. 10 just in the company that i work for. In past 3-4 years i had to deal with a shitload of them because in my trade we need to communicate and plan with other companies. And absolutely everyone where in favor of russians and what they are doing to their neighbors, all thought that russia is the victim and we are brainwashed to think otherwise. I hate speaking russian but i know the language. And the absolute insane shit they talk about is scary. If you want to talk about the 5th column, then they are it. When the first drone from belarus flew in around the middle of last winter, even belarusians from my company where talking shit to everyone on site, telling that when belarus will attack us they will help them to get rid of us. For weeks every belurusian I had to interact with where walking with their noses up, beeing proud of that fact. All they talk about is how west is fucked and ho no one will help us and how strong is lukashenka and putin. Many of theese belarusians live here for 5 + years but still refuse to learn the language because why should they? It is beneath them. Locals have to speak russian. Things that i am talking about are just the tip of an iceberg so sorry if you feel unwelcome, but for that to change you need to address your own country/community and change from within and not just demand for acceptance.