Hmmmm, I was unaware that Beth Din courts allow for killing dishonorable female family members, female genital multilation, stealing the property of infidels and raping aka 'marrying' nine year olds. Learn something new every day.
And why would you assume that Sharia courts in the US would allow those things either? Criminal law would certainly overrule any Sharia courts in the US.
Britain has 85 sharia courts: The astonishing spread of the Islamic justice behind closed doors | Mail Online
And NONE of those 85 Sharia courts overrule British Criminal law.