Ha-ha-ha! I can explain it:
1. Russian peoples are not rich. Our own cars (VAZ, GAZ, etc.) are shitty. Generally we prefer to buy used cars from Europe, USA and Japan mainly.
2. Russia is too large. At the East side it has Japany, and Europe on the West. So, people from Russia`s East side prefer cars from Japan with steering wheel on the right side, and ones from West prefer cars with steering wheel on the left side.
It was not always, only recent 15 years I quess, after PERESTROIKA... when every people finally get ability to choose what to buy.
In Russia we have three old plants which are were built at their times with FIAT and FORD. It was very very long ago, 30-40 year ago. Now it the same manufactures, the same equipment, but they still produce cars which new are worst than used ones from Europe or Japan...