Yes, the Chinese approach has been draconian and even cruel. But it has also been effective and the point remains that we should thank them for having succeeded in controlling their population.

I also do think that too little is being done to stop population growth globally because that growth is actually the root cause to most of our environmental issues. Note that between "too little" and your over-the-top claim of "genocide" there a gigantic chasm.

This also applies to Western countries. Many of them have incentives to boost natality. We need to 'free ourselves' from the idea that population growth as a positive and necessary thing because it simply cannot continue and a decrease would even be a net positive for the environment and quality of life.