Weird how only some people get to say things like this.

Right? I thought they were so proud,

The proper terminology is Mentally Challenged.

heh, nice

Takes one to know one….

:0)

As much as the word gay can just be a descriptor language likes to flip the bird at that kind of thing and people end up using it to call out people who are gay that and the matter of people dont like gay people so they can contextualise gay as an insult.
As for saying retard well I mean you cant be surprised that a word to insult the mentally ill insults mentally ill people and people in general.

A retard ( assuming the intelligence def ) would not have the brain to understand a joke and would assume it was a genuine insult

Maybe you should take some time to think about why someone wouldn't want to be referred to by a pejorative.

Or are you saying you lack the empathy to understand that?