^ Besides (re. your "will inevitably irritate DevilEyes and Diabolikate"), not once in this thread have I said that I believe Dukat didn't love Ziyal. I am actually fairly sure he did. But that love was so...so bogged down in selfishness and self-centeredness that you would have had to dig pretty deep to find it.
Let's just say that I've seen much better, purer, more all-conquering, more unselfish examples of fatherly love lots of times - in TV shows and in real life. My guess would be that just about everybody has. I certainly hope so.
Going crazy after she died isn't proof, though, any more than staying sane after someone you love dies is proof that you didn't really love that person.