Why did the Sino-Indian War and the Cuban Missile Crisis that broke out in the same year become the symbol of the open break of Sino-Soviet relations?

The public breakdown of Sino-Soviet relations was mainly the Sino-Indian War. On this issue, the Soviet Union considered its own national strategic interests, opposed China's self-defense counterattack against India, and was afraid of pushing neutral India to the west and strengthening western power. While ignoring the fundamental interests of China1.2000 square kilometers territory, thus forming the fundamental contradiction between China and the Soviet Union. The Soviet Union's open support for India made China people feel that it was an open betrayal of the Treaty of Friendship, Alliance and Alliance between China and the Soviet Union, which broke the Sino-Soviet relationship seriously because of the 20 major political reforms in the Soviet Union. The similar position of the Soviet Union in the Cuban missile crisis is not the reason for the open break between China and the Soviet Union. Just in time.