It seems that a bulk of fans are vastly understating this mans actions. Heel hooks are nasty business, a brutal submission, and this guy is one of the most devastating heel hook specialist in the UFC. He knows EXACTLY what he's doing in there with these submissions.
Let's put this into perspective (and he's done this many times in the past and been previously suspended for it). He snatches onto a devastating heel hook (an extremely painful move), his opponent is frantically tapping out in pain and desperation, the referee intervenes, but Palhares continues to put his opponent through agonising pain without his consent, potentially causing him career threatening injuries and just causing an absurd amount of pain in general. Also, not only does Palhares refuse to let go after his opponent has tapped, but he actually continues to apply even more torque and pressure to the submission before he eventually lets go.
I'm sorry, but this is borderline psychopathic behaviour, purposely continuing to apply serious amounts of pain and agony to an opponent who is clearly desperate for him to stop. That's the sign of a truly sick human being right there. Good riddance.
Your stance on animal rights today is a reflection of your stance regarding slavery in the past.