Why don't U.S. and western feminists criticize the harsh treatment of women under Islam?

I'm constantly amazed that self-described feminists--both in the U.S. and other western nations--never have a critical word to say about the ghastly treatment of women under Islam.  One wonders why feminists would steadfastly refuse to denounce such harsh treatment of women at maximum volume.

It makes no sense--unless that they see themselves as natural allies of any group that seeks to destroy the U.S.  Or unless the people at the top of the feminist food chain have some other reason for staying silent.  Beats me.  Any guesses?