Then you would think that when ISIS beheads someone that it's humane?
As to kosher slaughter that's not done out of any concern for the animal it's done out of an aversion to consuming blood as directed in Leviticus 17:14.
The animal must be killed "with respect and compassion"[1][2] by a religious Jew who is duly licensed and trained, often called in English a shochet (Hebrew: שוחט) although in Hebrew this word refers to a butcher regardless of any particular religion or culture. The act is performed by severing the trachea, esophagus, carotid arteries, jugular veins and vagus nerve in a swift action using an extremely sharp blade ("chalef") only by a qualified shochet. According to Jewish religious sources, this results in a rapid drop in blood pressure in the brain and loss of consciousness rendering the animal insensible to pain and to exsanguinate in a prompt and precise action.[3]
http://en.wikipedia.org/wiki/Shechita#cite_note-1
Are you vegan?