Führer assassination attempt - [OC]

There lived a German Colonel named John Wagner. He became a German soldier/officer with his friend, Lieutenant Karl Schmidt.

John and Karl were planning to kill the Führer because they hated the Führer, this Führer had killed their parents for reasons that are not clear. Because their parents died because of the Führer, they wanted to kill him.

Will their plan work?

(NOTES: THE IMAGE OF THE STORY IS NOT MINE, CREDITS TO THE CREATORS.)