I came to the same conclusion you did, and just decided he wasn't worth my time or energy. He can't bully you if you disengage.
You're a little new here to be coming to such conclusions. I engage with people kind for kind (save that I don't stoop to namecalling like Optimissed does). Optimissed just reaps what he sows. You'll figure that out, eventually.
The best debater on Facebook? Wow.....excuse me, but I question how high that bar actually is. I also question how many people actually uttered those words... "Of the billions on here, the vast majority of whom I never read, I deem you the best debater on Facebook".
I can say one thing....before I proudly cancelled my fb account a year and a half ago, NO ONE ever declared me the best debater on Facebook. Hopefully, no one said I was the worst either.....but then you have to look at what's important....that being not how WELL you debate on Facebook, but how MUCH you debate of Facebook, the less the better.