It's not like there's a global Sharia court somewhere "foreign".
Spend five minutes listening to Bill Warner explain about Sharia.
https://www.youtube.com/watch?v=cmyGC96ClcE#t=48
The speech goes from 7:00 to 49:30 42 1/2 minutes
Id like you to listen starting at 49:30 for a few minutes. The rest of it he answers questions.
If this hits your taste buds the right way go back to the starting point.
I found him to be amusing and very intelligent.
It was enough to raise the muslims ire.
That tells me they recognize it.