Moreover, I guess I have a different way to deal with offensive people even if they were serious - to ignore and scoff it off. I would never feel "offended" ever. Offense is taken and it is a choice. That's how I operate but your mileage may vary.
That's part of the problem. A bunch of people effectively didn't have a choice but to put up with this sort of communication style because their job required them to interact with the Linux community.
> Offense is taken and it is a choice.
This is a meaningless platitude. Whether you take offense or not, sometimes the most productive response is to tell someone their behavior is counterproductive, instead of stoically shrugging it off.
It turns out when you ignore people, they get the point. You don't need to bark back at dogs. Keep your head up, mind your own business and move on.
The guy is good a computers. He's less good a humans. Act accordingly.