ummm....byezopacnost (security)?
I can't answer this with any great assurance...but...
Russian voters tend to concentrate around the small number of Russian political leaders (Natan Sharansky and Avigdor Leiberman) who mostly have right-wing agendas (Roman Bronfman is the exception, who moved into Meretz, but Russian votes didn't follow him), they mostly read Russian language newspapers which have a right-wing editorialship, perhaps they are skeptical of anything that smacks of socialist (from my discussions with non-left Russians (I also know leftist ones) who hear of my political leanings, they sometimes attempt to dissuade me of my views by describing their lives in the USSR and equating Soviet Communism with any possible Marxist/Socialist...they will hear nothing of my arguements against that equation), plus I am sure the Chechnya situation is influential....
I know that in 1992, however, they tended to vote Labour, so there has been a rightward shift in their voting patterns.
This article from 1999 deals somewhat with the issue: http://www.salon.com/news/feature/1999/05/07/israel/index.html
Bryan