John Lennon was responsible for at least 2 people cracking up and murdering someone. The most notorious is Charles Manson, followed by Mark David Chapman.
John Lennon was a god. He was murdered by one of his subjects. Lennon could write songs that were unspeakably good. Some people were so taken aback with Lennon's genius that they used it as an excuse to go on rampages.
Lennon was not responsible for his greatness. He could not help how he connected to people. His job was to let it all out.