Greasing the windmills of your mind with the blood of the guilty

Hans hated tulips. He had a special pair of tulip-stomping boots he wore when he went on his tulip-stomping walks.
“Why do you do this?” said his neighbors. “Tulips are beautiful.”
“Tulips are Satan’s handiwork,” growled Hans, stomping.
Hans’ neighbors replanted the tulips.
And Hans kept stomping them.
The neighbors were worried for Hans, so they asked the mayor to pay Hans a visit.
They argued, Hans stomped the mayor (with his mayor-stomping boots), and the neighbors began to worry for themselves.
That night, an angry mob killed Hans.
I bet you can guess what flowers were at the funeral.