I don't think we should shy away from criticising cultural and religious practices that are abhorrent crimes from wherever they emanate. Having been raised a catholic, I'm damn glad that much of the wrong doings in the religion that dominated my early years, are now out in the open, in some cases, although not enough, perpetrators have been punished, often without the co-operation of the hierarchy that has certainly been a problem. All religions should be subject to scrutiny, they should not be allowed to be a law unto themselves as if they have some divine right to flout the law of the land or dismiss what society deems acceptable. .
Of course, as with Christianity, there are many strands to Islam, both hard line and far more relaxed, I have no doubt that many within that religion would not subscribe to little girls being married off to adult men, but criticism has to come from within as well as from the wider community.