Why does it seem like black cashiers pissed off.?

i am a black man as blk as they come but i don't understand why my people demand respect but they don't respect themselves.there are people who died so that we can become equal in america.there was a time when we could not try on clothes,you had to know your size, now women are wearing thier clothes to tight and the men are wearing thiers to loose,why did we stop combing our hair? i'm not talking about nice dreads i mean the ones with nappy hair with a comb stuck in it! our fore fathers must be spinning in thier graves.there so much more i have to say but i don't have the space.please if your a racist or a nasty person please do not answer the questions.