Yup. The population of Kazakhstan in 1960, for example, was about 43% Russian, 7% German and 1% Korean.
My cousin’s ex-wife is from Kazakhstan, but she isn’t ethnically Kazakh at all, she’s a mix of four other ethnic groups. His kids look really interesting and multi-ethnic.
I had a friend in Almaty who was half-Russian and half-Korean. She looked quite Kazakh but she didn’t identify with them and didn’t really speak the Kazakh language. Still, Almaty was her home. Once we were discussing Kazakh ethnic nationalism and some of difficulties non-Kazakhs faced in Kazakhstan, and she said: “But everything will be all right. I believe Putin will protect us.”
Well, he probably can, if Kazakhstan is going to join this Union. It will not, after all, be a partnership of equals, and Russia will always be the core state and call the shots.