No, it means that communicating with Russians is like talking to a petulant retard with a Down Syndrome: you have to repeat yourself slowly and avoid using big words.
Not really. Its more like walking into a biker bar and asking for them to quiet down. Unless you have the ability to force them to quiet down, they are at best going to laugh at you. At worse, you're getting a beating.
Further, it is the person who thinks that their choice of words is the key to achieving the desired result, who is really the petulant retard.
Small side issue, but I've never spoken with a petulant person with Down's.