Why do i want to hug people then kill them?

Theres this opposite thought process that goes on inside my head pretty much 24/7 and i dont mean like the normal should I or should I not type of thinking i mean like completely opposite thinking. For exaple: Im outside and I see a squirrel, i think to myself omg its so cute i wanna pet it and like 3 seconds later im thinking im gonna throw a rock at it and smash its head against mine then im gonna use my hands to rip its gut apart. Its really weird because theres like these opposite personalities inside me, one