@BernieDoesIt @violetmadder @hosford42 To continue the thought — knave, though, really doesn't carry that context, at least to me. A knave can be a deceitful, dishonest person who chooses to act dishonorably or to live outside the law; or simply a servant (usually a young male) or someone of ignoble birth. (See also villein and rogue.) Neither of these contexts have bearing on the objective wisdom or foolishness of a person's actions. I am finding myself having great difficulty up with any adjective much different from "unwise" or "ill-advised" to negatively describe the wisdom of actions, that does not
have a noun form typically applied to a person to indicate that they behave, whether intentionally or not, in ill-advised ways, and your argument seems to me to be that any such noun, and therefore any such adjective, is automatically ableist.
Now I see two problems with this. The first is that if all negative terms in any subject are excluded as ableist, it becomes impossible to express a negative opinion of something in that subject. And then you lose the ability to criticize — in this case, bad actions. And if you start using instead words like 'jerk' and 'asshole' to convey different meanings than are usually understood by them, as substitutes, then you've done two things. First, you've confused people as to what you mean. And second, by using those words as substitutes for a category of words that you've decided are ableist, you have de facto moved them into that category, and now you can't use them either, because now they
are ableist.
The second problem I have with it is that if you assert that using words such as 'stupid' and 'idiotic' to describe bad actions or people who choose them is ableist about some certain set of people, then it seems to me that is tantamount to saying that bad actions of that type distinctively identify
that set of people. And now by trying not to be ableist about them, you are being ableist about them.
Ultimately, the gripping hand is I think you may be trying to read too much into this. Sometimes a cigar is just a cigar, and sometimes a stupid action is just a stupid action. All of us are stupid at times, because we all do stupid things, whether through malice, ignorance, thoughtlessness, or forgetfulness — or even because we're in a bad mood. "Stupid is as stupid does, Sir!"