According to Sharia law, killing one’s children or grandchildren is an action not subject to retaliation, just as killing a non-Muslim is an action not subject to retaliation.
This shit will only stop when enough of the jihad preaching imams get dragged into the street and beaten to death. They are cowards who send their weak minded slaves out to do their dirty work. When they discover that they themselves will have to pay the price for their hate preaching, it will stop.