Oh boy - While I am not a great Microsoft fan I will have to defend Bill here. He is not in any way advocating murder. Vaccines will secure the lives of the babies in the third world so the parents do not have to get three more children just to make sure...
That is what Bill Gates is talking about. And the mere fact that the world is overpopulated in regard to production of CO2 (and getting close on food consumption) does make it sensible to depopulate.
I don't think he had concentration camps in mind where they use Vaccine in stead of Cyanide.
There is a lot to be criticized about a "Microsoft founder" getting billions worth of publicity for the trademark doing charity work. In fact Microsoft has a charity program where all employees get 3 days off to help institutions like Red Cross with software etc. -(this is hidden marketing - I do not think they are allowed to implement Linux during those three days - even if it is voluntary). Guess what - the Red Cross is using Windows, probably by coincidence.
The softhearted Microsoft helping the poor is BIG business and Microsoft knows it ! They do not fail to mention their warm hearted nature either.
But stuff like this takes the seriousness out of the criticism - and I am convinced it will only benefit Microsoft.
So for Crying out loud

Bill may be bad but he is not a (potential) mass murderer.