What is the reason for Shuunyavaada in Buddhism?

[A question by Shri Kishore Ram]

Swami replied:- Shunyavaada means that the entire creation is always unreal. This concept was established by a Buddhist called Naagaarjuna. The reason for this concept as per him is that the moments of experience happening continuously are momentarily destroyed due to which we can realize that the items of the creation are unreal. Shankara opposed this argument by saying that at least the awareness grasping the unreal nature of creation must be existing without which the unreal nature of the creation cannot have any authority. Buddha kept silent about God because the unimaginable God or Parabrahman is beyond words, mind, intelligence, logic and even imagination. This silence of Buddha was misunderstood by His disciples as the negation of God.