The facts are that Utah authorities ignore the 30,000 to 60,000 living in polygamist families in their state. AZ, too. And the feds have since 1953.
That Texas fLDS compound and Warren Jeffs in Utah weren't ignored any longer because they stepped up their facilitation of rape of minors (arranged plural "marriages" with minors).
So...if Muslims are "marrying" off minors, and if you can prove that, then your statements are valid. Otherwise, if you're talking about adults...well, Utah, AZ, and the feds didn't ignore the Mormons in 1953...But they have ever since...