KMT and Taiwan

The time period in which the KMT and Mao Zedong were competing with one another, is very intriguing. According to June Teufel Dreyer, author of "China's Political System," Sun Yat-sen converted to Christianity, and had the belief that capitalism should be reformed and not destroyed. At the same time, however, he also was accepting money and arms from the Soviets, and in return, Comintern advisers were reorganizing the KMT along Leninist lines. At first, Sun's perception was related more with Western nationalism, and after the 1911 revolution, the fall of the Manchu dynasty, he reformed nationalism as an opposition to foreign imperialism. Chiang Kai-shek took over for Sun Yat-sen after he passed away in 1925, and had much success with his industrialization strategy in Taiwan. Is this a major reason for why the Chinese and Taiwanese dislike each other? Is the animosity between China and Taiwan exaggerated here in the West, or is it beyond our comprehension?