By Tony Owusu Fast food restaurants are warning investors that the conflict between Russia and Ukraine could hurt business. When the first McDonald’s (MCD) – Get McDonald’s Corporation Report opened in Russia in 1990 the symbolism was thick. American style capitalism had officially defeated Soviet style communism with McDonald’s, a paragon of post-World War II America, planting a flag in the former Soviet Union. That first Mickey D’s opened the door for innumerable U.S. food and entertainment businesses to find new homes in Eastern Europe after the Soviet empire crumbled. Now, more than 30 yea…