Why did Nixon Hate John Lennon?

oh come on, hello!!!! it was richard nixon, who did he not hate....mind u, the way he spoke.... most people could not understand him lol :P Nixon seen lennon as a threat to his office, he disagreed with his songs or rather lyrics, add the backdrop of the vietnam war and the hippy period and it made him very nervous, incase americans being called up for their country...rebelled.....