Hmm.
I'll go on record and say it is NOT ok for someone to come into the US and attempt to continue cultural practices such as ritual female circumcision, "honor" killings, death sentences handed out by religious leaders, and other similar practices that are perfectly acceptable in islamic countries and cultures. These are not even "radical" islamic practices, they are mainstream behaviors. And they are not acceptable in the US, period.
If that means they have to give up their religion to immigrate to the US, so be it. But they will not import those cultural and religious behaviors to the US and expect tolerance or welcome.