Actually, not only is animal cruelty/killing banned, but Islam itself IS BANNED entirely, in the US by our Constitution (Article 6 Section 2, part 1 - the Supremacy Clause). Therefore, mosques should be shut down, all Korans eliminated, and everything Islam should cease to exist in the USA. This is a fundamental constitutional thing that has never been enforced. It should be, 100%.
In addition to the supremacy clause ban, US laws also ban many things that Muslims accept and practice, as is written in the Koran- mass genocide, rape, wife-beating, sex discrimination, pedophilia, slavery, animal cruelty, etc