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. If you genuinely believe it to be so, you may be from an actual intellectual, emotional or perceptual disorder of some sort.
It may not have been used or understood by the guys on the video to be a racist message (i.e. they may not have had a clue what they were doing) but I'm sure that PDP did. Whether he believed that they would do it or not is moot. He chose the toxic message to be displayed and, like it or not, it does show that he had a lack of understanding or maturity that he was crossing the line into racism. Does that make him a racist, not necessarily. People do stupid things sometimes and it's only after when they realize that the message wasn't what they intended.
This act alone was enough for him to lose his corporate sponsorship. In this day and age, no company wants to anger their customer base. The other videos, out of context or not, might have had some bearing. However, I'm pretty sure that the corporations would have done their due diligence and actually watched all of the videos brought to their attention before pulling their sponsorship.
There may be some validity in criticism in how the media is handling this but it's his actions that caused it in the first place...