Renting Apartments in Russia

When you're browsing through apartments you might want to rent, it's pretty common that you see slavs only. I think the reason that phrase is fairly common in russia is its safeguard against a labor migrants who might rent blik. You maybe one person rents an department, but then a whole bunch of them moves in because they don't have money and need to work at the construction side somewhere. So it's, i like a landlord would say, this is what i'm concerned about. But my point is, yeso, apparently everyone, once in a while there is some kind of form of discrimination of that sort. And its, from what i can gather, not widespread