Mao is the founder of modern China. He brought about the great Chinese Communist Revolution that created the modern PRC. To disparage him for 'bloody history' is like blaming Jinnah for violence of partition. Stalin helped establish USSR as the Superpower and helped destroy Hitler's Nazi Germany during WW2. Xi Jinping is helping to make PRC into a superpower (besides helping Pakistan financially without which many Pakistanis won't have flour). Hitler was born to a Catholic family and was never an atheist.
On the other hand, all the perpetrators in
came from observant religious families. Can one blame their religion for their crimes?