"هؤلاء الاحفاد من اولئك الاجداد"
This slogan has lots of baggage, but basically the it infers that residents of Mosul can be considered descendants of those who killed Hussein and thus responsible for their actions. The literal translation is "Those descendants are from those ancestors." While blatantly sectarian rhetoric from the PMF is nothing new, such slogans do not bode well for the coming battle of Mosul. In the tweet above, the slogan is used by a sectarian Sunni on Twitter to mobilize sectarian sentiment against the PMF (and presumably Iraqi forces as well).