In fact, none of the derogative expressions related to dogs actually apply to the dogs. They really refer to people.

事实上，那些贬损狗的词汇，从来都不是用来骂狗而是用来指人的不良行为的。

youdao

They were arrested after officers from British Transport Police (BTP) observed them singing songs of a racially derogative nature.

BBC: Glasgow & West Scotland

We should look at the way women are addressed, especially in the workplace, and if the word "girl" is used in a derogative way, in which it is used against boys on the playing field.

BBC: NEWS | UK | Head to head: 'Girls' or women?