So, I would imagine that the general joke of Russian judges in the Olympics giving low scores is some sort of a Cold War holdover, but is there any single event that gave rise to this stereotype? As a follow up, how much truth was there to the stereotype (as compared to judges from other countries swinging things one way or the other)?
OP, if you don't get answers here, consider x-posting to a sports sub, eg /r/sports, or one that specializes in the Olympics or judged events like figure skating or gymnastics