Haha only on low elo? You must be joking. One of the best, or if not the current best CSGO player in the world is super toxic(Simple). Haven't played against lower leveled players in years, but damn dude there is toxicity in every damn skillgroup. And Russians are more toxic than others for sure.
I have never had anyone threaten me and my family by any other people than Russians. And its not just like "im gonna kill you". Some of them describe it so damn well, I wonder if they have done that shit irl to others, and it kinda creeps me out.