Criticize the act on the merits of the act, but don't use a physical condition as an insult. I don't think it's as hard as you make it out to be. For example,

Criticize the act on the merits of the act, but don't use a physical condition as an insult. I don't think it's as hard as you make it out to be. For example, I could say that you're ignorant of the harm that the colloquial use of "retarded" has on disabled people. I could say that you're being needlessly obtuse or selfish by claiming that you should be able to call things "retarded" despite polite requests to stop. I could say that you're callously dismissive of disabled people who are asking for you to stop using the word "retarded" as an insult.