To break down my response to this

The R-word is EXCLUSIVE

There are people with high intelligence and those with low intelligence, bandying about with different words will never change that. Intelligence is crucial in social, economic and evolutionary terms. They are correct no one would ever want to be lacking in intelligence because it would only make life worse. There will always be a need for a word to describe someone of lower intellect, or describe an argument or position as being thoughtless, in order to dismiss the person or idea as quickly as possible with as little engagement possible. Preferably while using small words so they understand.

You can still say they have a room temperature IQ but they might not get the meaning...

We are someone that is not your kind.

I agree, and I would not want someone with an IQ of 70 to be in the military, or to be a teacher, or a doctor, as each of those scenarios would likely result in disaster not just for the 70 IQ individual but for everyone impacted by them.

Everyone has a gift

Yea no. This "everyone is special" bullshit just isn't how the world works. The universe doesn't care about you, the world is a harsh place where the unfit died early deaths until really intelligent people worked out how to increase food production, developed medicines, surgeries and hygiene.

Retard equates intellectual disability with being DUMB or STUPID

You only need to look up the etymology and history of clinical usage of both dumb and stupid to realise they were used to describe the same groups of people and behaviours during different time periods. More bullshit on the treadmill.

I refuse to censor the word retard while moron, stupid, dumb and idiot are considered fine. To censor a synonym of acceptable words, is to put it bluntly, fucking retarded.