The grammar is a little confusing, but I believe Whitie means "those who are familiar with Mike's record are offended by his repeated dishonesty." That is certainly true, and the documentation is right here on this forum: you can easily find posts by people who are familiar with Mike's record who are clearly offended by his dishonesty. Truth is an absolute defense against the charge of slander.
Well, that could be where the problem lies. Perhaps I interpreted the verbiage incorrectly. Now that you have thoroughly explained it, it seems to make more sense. It appeared to me at first read, that the "dishonesty" language was meant to be personal rather than general. . Much obliged for your assistance.