User blog:Callumthered/Boer War starts WWI?

I have an idea for a new TL, and I want to see what you think of it.

During the Boer War in 1901, Australian Lieutenant Harry "Breaker" Morant killed German missionary Reverend Heese. The British high command court martialed Morant and had him executed, for the murder of the Missionary, as well as the killing of some Boer POWs.

But what if he was not executed? What if the German government, incensed by the murder of one of their subjects and already groping for reasons to join the war, allied with the Boers? What then?