I don't know much about the guy, but I assuming he is young and fully indoctrinated into some fringe animal rights group. He wants the hunting bloggers to justify canned hunts or varmint huning, or something. Most of what he says makes little sense, really. He talks in circles and quotes half truths about hunting.
It is hard to argue with someone who has so few facts that he can actually back up. To help him argue his point he has printed of a statement from the IDA website. It states all the reasons about why hunting is bad, but it only contains half baked truth and opinion. I see very little in the way of verifiable facts. But apparently it is the gospel to this guy.
The IDA seems to want to elevate animals to the same status as humans in the world view, with all the same rights and privileges. It also seems that their main goal is to create a world of vegans. It is all so very anthropomorphic.
Below you will find a version of an energy pyramid.

Notice, herbivores are always at the bottom.
While I would never expect Dell to really poke around and try and understand the other side of the argument. I encourage you, dear reader, to poke around their website, see what you can find. Some of their goals are noble, though I think Dell does them a disservice by acting as their potty mouthed representative.