The link didn't work for me, so I'm not sure which hunter we're talking about, but there was one (Michelle Eichler?) who aired an episode recently in which she arrowed a lion. The circumstances were such that it was painfully apparent that it was a canned hunt, in an enclosure, targeting a lion which was far from truly "wild" and quite possibly even drugged.
Lions are, or have been until recently, bred in South Africa specifically for this purpose. It is, or was, totally legal, and although most find it extremely distasteful, apparently there were plenty of people happy to do it. Naturally the antis seized upon this practice like harpies, and it's hard to defend something that you yourself don't approve of...the best that most hunters can do is say "to each his own" and carry on. Some are very strident in their condemnation of the practice, and so of course the antis have even more ammo to use against us: "Look! Even other hunters won't do this! BAN! BAN! BAN!"
To add insult to injury, a lot of guys who went to Africa for a true hunt were hoodwinked into thinking that they were shooting a wild lion, never realizing or suspecting that the critter behind the crosshairs had a pedigree, a name and no natural instincts. When they proudly showed photos of their "trophies" and were called out, well, that's where the fighting starts! Bad situation all around.