My Lithuanian friend gets angry when I speak Russian to him in public

My friend’s from Kaunas and moved to Magdeburg, Germany 3 years ago, and for the last two years he’s been angry that the German Mietservice shows him mostly offers from Russian and Ukrainian landlords. He’s still renting, and gets angry at the sight of my Russian pronunciation, calling it “slave language” when I speak to some Russian girls he’s introduced me to. He adopts a weird hateful and scornful tone, which I have to differentiate from his normal tone, and he hasn’t been replying to my texts.<br><br>He’s also got vitriol for Eastern Germans, mostly due to his bad experiences in Moldeburg, where he got jumped, and says Moldeburg is full of Russian, Ukrainian, and Polish families who haven’t worked a day in their lives. He told me once that’s why he thought of abandoning his teaching job because he’s too hard on the young kids who are a bit thicker.<br><br>I’m an English teacher and like to chat with my Slavic friends in Russian as much as possible. What do I do? We chatted once about his opinions on international Slavic relations and he said Slavic people are kind of dumb and backwards for wanting to have a close-knit Slavic bond. What do I do?<br><br>My half-Russian friend is also from Lithuania but he speaks Russian fluently, whereas the one I’m talking about speaks very little and sparsely.