@crewger1, I think you’d be most likely to get that reaction with a personal note in which you recalled some endearing trait or favorite anecdote that was in no way mocking or ridiculing. Not every funny story that made you laugh when the person was alive makes a good condolence card. Above all you must be sensitive to the feelings of the bereaved loved ones.
For example, when my mother died, a story about how she played matchmaker between my uncle and his wife of fifty years was a good one. A story about how she tried a power move on her church’s music selection committee would not have been.
You can write your note on a conventional card (many of which come without religious-sounding blessings and instead just say “I feel your loss” or words to that effect). Or you can just write a note on notepaper or a blank card.
The difference is that it’s not something humorous about death but rather something about the individual deceased person that brings up a funny or happy memory. You can’t get that by way of mass production.