It's more than being white. That's just a skin color that is very common among Muslims as well. It is the shared European/Christian heritage going back to the ancient Greeks, Romans, and then the age of Christianity.
Europeans have a glorious, shared history going back thousands of years and they have deep ties in ethnicity, religion, culture, art, architecture, etc. Russia has always aspired to be accepted by Western Europeans, but they always treat it with contempt. But Russia would still prefer to be a second-class citizen of the West rather than align with Muslims or Chinese. It’s in their blood.