Why do people have to hate celeb

i mean why hate on them what did they do cause this girl name amy36y is cursing about selena even her sis too link whyyyy why do they have to bully celeb they didnt to anything sometime it cause who there dating i feel bad for the celeb it annoying me and it make me upset to hurt ppl feeling that why ppl kom bij fanpop just to make fun of are favoriete celeb