China has begun to restrict visas for foreign visitors. The Washington Post presents several perspectives on why this is happening, including Olympic security concerns and a growing sense of nationalism among Chinese. On paper, the visa rules for China have always been strict. In addition to frustrated potential visitors to China, the economy is also experiencing difficulties due to the new visa restrictions. The Wall Street Journal reports on the vacant hotels in Beijing, built for Olympic visitors and other tourists who are now hampered from entering China….