Many do horrible things, but it is anethma to Americans and Jews in particular to refer to any human being as an amimal.
That is exactly what Hitler did. He showed pictures of rats and then of Jews and said that he was doing the world a favor by ridding the human race of Jews.
If you cant take the Islam out of the muslim you have to get rid of the muslim. Just because you dont like the term $hit is and will always be $hit. The Koran says you should die, submit now or face reality and kill the infected ones.
My dogs would take any comparision to these people as an insult, but I do agree, they are people, not animals.