It is trolling, for one simple reason: He obviously doesn't mean it. That's exactly what trolling is. And if the people you are trolling do believe you and get riled up, then the mission has been a total success.
Do you honestly believe Chael means any of this shit? The dude just filmed a TV show in Brazil where he helped train a bunch of Brazilian chaps. Personally, I will take actions over words any day, to determine a persons true persona.
Wandy is just a village idiot with no sense of humour. Getting wound up over some words and making dumb videos which do nothing but feed the troll. Even more dumb when you consider they are actually going to meet in the cage and settle this soon enough.
What part of taking steroids and walking in at 6 times the limit of testosterone for a fight, committing real estate fraud etc. is words and not action?
He doesn't mean it is irrelevant. If I walked in to work and called my boss a piece of shit, I'd get fired whether or not I meant it. Saying insulting stuff to someone, their family, or culture is being a dick, whether or not you mean it. It's not joking or trolling or whatever cover up excuse people make for it.
Not unless you are close friends, in which case it's just buddies pulling each other's leg. Or it is your own culture, family etc. you make fun of, in which case it is self-deprecatory. Other than that it is just being an asshole. I don't understand why people don't get this or try to defend it, it's not a terribly hard concept.
Also Chael is training a bunch of Brazilian dudes because he gets paid mad money to be on TUF, not because of his heart of gold and charity for Brazil. He'd train dogs if they paid him to do it. I'd be more impressed if he did something like this on his own.