I can assure you that (outside of Austin, at least) any attempts to impose islamic law would would be extremely short-lived (and very exciting).
I can assure you that the residents of Dallas-FW and Houston would not even raise an eyebrow in the face of Shariah law.
They didn’t care about the Holyland Foundation and it’s associates in Richardson, Arlington, Irving, etc. They didn’t respond to the ugly murders of Amina & Sarah Said, and those who did speak out regarding Joe Kaufman....spoke out against him.
http://www.dallasnews.com/sharedcontent/dws/news/localnews/stories/101507dnmetprotest.3156219.html
Boone, Crocket, and Travis are dead. California emigre’s and folks named Mo and Ibrahim rule most of Texas...unopposed.