He may well be a troll. Entirely possible. But the videos I've thus far seen were not of a trollish cast, and the "Death to All Jews" one in particular is not remotely anti-semitic.
He may very well not be anti-semitic (I can't be arsed to RTFA, and I don't care about him one way or the other), but if he simply wanted to raise attention to the fact that "support" can be bought online why didn't he have the guys wave a sign that says "I Stomp Kittens"? Would most likely have offended a different target but not cost him his contracts.
Why would he be surprised and "dumbfounded" that one can hire people to wave signs with an "over-the-top message" for money? Purely as an example, minimum wage in Uganda is $1.7 per month. Seen in that context, getting the equivalent for 3 months' worth of wages for a few minutes of waving a stupid sign sure looks like a nice windfall. Even in more affluent areas people will do crazy shit for $5.