But no, I wouldn't think it offensive if it were relevant to the topic at hand. Which it isn't in your imaginary version. And if you're upset about the "shitty white male programmers thing", take it up with the person who wrote it, but it wasn't me. I just said I wanted to see his code so I could see what kind of programmer he is.
Regardless, if that's the best you have, I think we can conclude I said nothing that is either slander or defamation. You accusing me of doing so, ironically, appears to be defamation. I look forward to the effusive apology you apparently believe due in such situations.