As we talk about person first and identity first language, it is important to note that these are terms that are preferred by some members of the disability community and are not part of political correctness. I would say I am a person with Cerebral Palsy when using person first language. You can also talk generally and say person with a disability. With identity first you would capitalize the name of the Disability as you are talking about a group. Either way, you want the people you are talking to, to have some understanding of what your disability is or ask questions to get an understanding. I want to be clear and point out a term or an overused term.
Person first or identity first language is not part of political correctness. No one should be nervous about word usage or made to feel bad about feeling offended. I believe this is how the term political correctness is confusing. As self-advocates we want our allies to be comfortable explaining things and supporting us. We also want society to know what’s offensive without being accused of being politically correct. If it is the case where one believes anything you want to say is ok to fight against a term, then civility is gone and it could lead to allowing violence in recent like in a Trump rally in Chicago. The best we can do is to listen to one another. Understand that respected terms are important to communication and understanding. Whether your issue is to use identity first or person first language, the important thing is that you are civil and respect other communities.