There have been many fights between rival subcultures such as mods vs. rockers, and Mexican emos vs. metal heads. So how could there be a situation where the pacifist, drugged-out beatniks get into a fight with hippies?
The beatniks were the ancestors of the hippies. Not sure it's possible.
Jack Kerouac though in the 60s tried to distance himself from the hippies by fashioning himself a conservative.