The analyses suggest that there are more than 8 million adults in the US who are LGB, comprising 3.5% of the adult population. This is split nearly evenly between lesbian/gay and bisexual identified individuals, 1.7% and 1.8%, respectively. There are also nearly 700,000 transgender individuals in the US.
The definition of cruel is someone or something that deliberately causes pain or suffering. An example of cruel is Hurricane Katrina. deliberately seeking to inflict pain and suffering; enjoying others' suffering; without mercy or pity. causing, or of a kind to cause, pain, distress, etc.
According to the American Heritage Dictionary, the definition of Humane includes such words as compassionate and merciful. To have one's throat involuntarily slit may be many things, but few on the receiving end of such an act would be likely to call it merciful, or compassionate. Hence, humane slaughter is an oxymoron.