Praise then darkness, and creation unfinished

I'd say that "your a creep" might serve the purpose, but doesn't explain in any meaningful way. Something more along the lines of "I think you're a creep because..." seems to me to be called for if one has the time & energy for it. That someone does not learn anything useful from even multiple-source explanations fits my definition of "non-sane" (In the sense of "irrational") and I'm not suggesting that anyone is under any kind of obligation to patiently explain things to someone who's been identified as being that kind of person. (I tend to do it because it makes me feel better, but that's just my idiosyncratic Nature.)