The 5 - 10 million Congolese who died under Belgian rule is probably much higher as a percentage of the population than the great leap forward.
Great leap forward killed 4% of Chinese population. Vietnam war killed 10% - 12% of people in Vietnam. I do not see condemnation of US here..Rather, I see the celebration that US has a democracy.
The Vietnam War caused a lot of changes politically and militarily in the US because the US is a democracy. We make a lot more effort not to go around slaughtering civilians these days. Nobody wants to be a babykiller.
War has never been nice, but peace is supposed to be. It wasn't some foreign invader that killed that 4% of China's population, it was their own government - the organization whose primary purpose is to look out for their welfare.
Everything is a matter of perspective, ... and propaganda.
I will always condemn the Vietnam War, as well as Leopold 2's murderous regime in Congo Free State. Those do not excuse Mao's murderous policies, no matter how necessary it was to repair China after the destructive Opium Wars. It was under Deng Xiao Ping that China's recovery began.