I assume they mean the Russian community is toxic in the in game chat when they play games. It's a very common stereotype along with Chinese username players being cheaters
The (obvious) Chinese players on the US wow servers were always good farmers (aka cheaters), but perhaps counter intuitively, if you managed to befriend them, they were usually pretty cool people. Very friendly, would chat back and forth in a new created English-mandarin pidgin, maybe they’d share some gold or items with you.
From what I understand Chinese gaming culture just legitimatly doesn't see cheating as a shameful or cheap thing, it's just a way to play the game.
Way back in the 2000's when I was playing WoW, we had someone in our guild using some Chinese service to level his character and farm gold with it. After some time everyone befriended that Chinese person playing his character and we even invited him to come along with us doing quests and stuff. (Never interacted much with the original owner of the account, as he had a busy real life and wasn't on that much).