Political correctness demonises white males and makes the white male's opinion synonymous with privilege. In doing so, it marginalises the majority. Under political correctness, if a white male talks about females, they are sexist. If they talk about ethnic minorities, they are racist. Their opinion is shot down with a litany of curse words and they fall victim to the label of Islamophobe, homophobe, xenophobe, genocide-apologist, and transphobe.
Consider the case of Richard Kemp, the former commander of the UK forces in Afghanistan. Kemp was shouted down at a meeting in Sydney, Australia for simply stating a pro-Israeli political position and labelled an enabler of genocide.
In this respect, political correctness doesn't promote inclusivity for everyone. It promotes inclusivity for everyone except the majority. It demonizes the white male and puts the feelings of the marginalised ahead of the feelings of the majority.
It isn't even marginalised communities who are the most offended by un-PC microaggressions. It is just liberals that get offended. Those most likely to support political correctness are white people with a college education who earn more than $100,000 a year. Even the communities political correctness is supposed to protect are ambivalent or actively dislike the practice.