" Sharia is nothing more, nor less, than a principle that a religious Muslim will follow the commandments of the Quran." Actually "Sharia Law" in it's use and practice is where a Muslim takes and excepts only the  'LITERAL' interpretation presented in the Quran. Which s more often then not grossly exacerbated to unspeakable extremes by SOME  Muslim Clerics and leaders.

http://www.towleroad.com/2016/10/muslim-preacher-who-called-for-beheading-of-gay-people-to-lecture-in-london-watch/

Sharia Law encompasses many gross extremes including but not limited to racism and bigotry. Which makes the left's argument of " racism and bigotry" against the anti-Sharia protestors appear silly if not right down ingornate.