Well what about the argument that Qabil is just a primitve way of identifying yourself and that the modern nation-state is a more useful common rallying point? Other more advanced nations in Europe and even Asian countries like Japan had also clans and tribes a couple centuries ago but have now moved on to more sophisticated stagesAt it's base level Qabil is not harmful like fgm and other things. You can try and prohibit it, but there isn't a solid argument against it like for other things, so I doubt it will catch on.