Here's an example: "It is unfortunate that you interpreted my suggestion that you go and jump off a cliff as an insult. That was never my intention."
Further discussion can be forestalled by adding: "It was a off-hand comment which I have no intention of repeating."
So the person who complained was at fault for their interpretation and would be small minded if they continue to make an issue of it.
This is similar to the approach taken by the European Parliament when people have raised its use of a feeding bottle in a promotional campaign for the forthcoming European Election. This was used to highlight parenthood and work-life balance. See below and my blog at:
Here is the response:
---Email from the European Parliament
Well, yes, it is unfortunate that this poster is interpreted as encouraging bottle feeding. But it is more unfortunate that more thought was not put into the use of images.
And more unfortunate still that the response shows nothing has been learned by the Directorate General for Communication.