Cow is not prophet , scripture or God and its part of food chain
Cow is "sacred" to us...
I guess the word "sacred" is lost on a lot of people.
If you want to insist on insulting things sacred to us, don't demand us to respect your sacred things.
US has absolute freedom of speech. They can insult anyone, god, man, prophet, book. They can draw any cartoons and tear any book.
Fortunately we don't. Either we do the US way of things of having absolute freedom or live side by side, respecting each other.
Either way is fine us....