It’s not sampling bias. Russians are disproportionately dangerous drivers. Look up the data. There are just many more repressed people taking out their anger on the road than in many other cultures, plus more alcohol,poorly maintained vehicles, wet and icy roads, less consideration. However, if you get to drive in the middle east, it makes Russians look like churchgoing grandmothers by comparison. https://www.quora.com/Why-are-Russian-people-such-bad-drivers