clo,
re: "Is [that ad] legal in yours?"
I'm sure it's not. But a few years ago people would have raised Holy Hell about it and the police would have been knocking on the shop's door the next day. Today, no.
American culture is RAPIDLY evolving. Devolving, in my opinion. So your blow-off attitude regarding Sharia[h] Law strikes me as naive.
Sharia[h] law has come to MANY countries that, a few years earlier, didn't imagine it could. Could it happen here? Yep. About all it would take would be for a whole lot of people to blow it off as 'nothing' and for Islam to continue growing in the U.S. at a rapid rate.

Gold is $1,581/oz today. When it hits $2,000, it will be up 26.5%. Let's see how long that takes. - De 3/11/2013 - ANSWER: 7 Years, 5 Months