J K Rowling has done nothing wrong INHO.
Churchill on the other hand, if we are being brutally honest, he is another matter entirely.
We could have won the war without him, given the qualities of our generals and the British people. At the end of the day, the war in Europe finished mainly because of the fact Hitler attacked Russia. From that point Germany was doomed.
Churchill used chemical weapons against Gaza in 1917, against the Bolsheviks in Russia in 1919 (An attempt to restore Russian royalty) at Emtsa, 120 miles South of Archangel.
Churchill also wanted to use these chemical weapons against "rebellious" tribes in India.
"I am strongly in favour of using poisoned gas against uncivilised tribes," he declared in one secret memorandum. He criticised his colleagues for their "squeamishness", declaring that "the objections of the India Office to the use of gas against natives are unreasonable.
In fact, Curchill was enamoured with chemical weapons and used them against tribesmen in Iraq and Afghanistan.
Churchill ordered the Black and Tans into Ireland in 1920, an act of sheer, muderous brutality, which ultimately led to new heights of bloodshed in Ireland.
In 1922, Churchill ordered the bombardment of Dublin, in order to remove Republicans from the Four Courts.
After WW2, in his second stint as PM, Churchill was key in ordering the 1953 Coup in Iran, which removed the democratically elected PM Mossadeq, and restore Shah Reza Pahlavi to the Peacock Throne.