Arguments for political correctness?
It makes us focus on the wrong issues. For example, nit picking males use of words in regards to women takes attention of men and women who engage in human and sex trafficking of young girls and women. “Islamophobia” prevents intellectual discourse on the issues of religion and radicalism in western society.
Slurs and certain terms were often coupled with discrimination and taunts. Throughout history oppression and discrimination of minorities were exacerbated by stereotypes and epithets. These verbal attacks helped cause a divide in society and ingrained a mentality where some groups were considered above or below another.