We've all known Nucc for at least 10 years now, and it is rather apparent that his anger, hatred, and mean-spirited nature is getting worse as he's aging. Who knows why he is the way he is, as there could be lots of reasons. I suspect that it is associated with declining health. So I can't hold it against him, and I also know not to take it personally.
"Forgive him, for he knows not what he does" seems the appropriate approach.