Make no bones about it… It’s a bone of contention.
Those are idioms, not to be confused with idiots. An idiom is a group of words which, when used together, has a different meaning from the one which the individual words have, while an idiot is all too clear, to everyone but himself/herself.

It’s interesting to do a Google search for “Who is an Idiot?” I suspect that over time, the search results will change. There seems to be no shortage of idiots in the world.

DISCLAIMER: If you are an idiot, I did not mean you. Idiots are always the other people.
Wink wink, nod nod.