Wahhabism is a school of thought based on the killing of innocent people. This is not a hidden or unknown fact because even their religious textbooks are filled with teachings which clearly indicate that only Wahhabis are the true Muslims and all Non-Wahhabis deserve to be killed!
Cut off the Roots of the Crime
It is surprising! Although they see that such crimes do not affect the glory of mourning ceremonies for Imam Husayn (a.s.) at all and it is observed greater every year and such crimes make Shia more determined to continue their way, they are too silly to understand it.