There is a hadith in Imam Ahmad Bin Hanbal’s Musnad (Musnad madiniyyen No.15962): It has been narrated on the authority of Hadhrat Saib bin Khalad (May Allah SWT be well pleased with him) that the Holy Prophet (Sallallahu alaihi wa sallam) said: Whoever frightens the people of Madina by their oppression, Allah SWT will frighten him and on him rests the curse of Allah SWT, of the angels and of all the people. Allah (SWT) will not accept any obligatory (Fardh) of optional (nafl) act from such a person the Day of Judgment.
Now didn’t this mass slaughter by the Wahhabis frighten the people of Medina? Evidently it did. Not to speak of those of Makkah al-Mukarrama, at-Taif and other cities. Therefore, isn’t it reasonable to hold that upon such perpetrators of genocidal murders and inhumanity the curse of the Holy Prophet (sal Allahu alayhi wasallam) and that of the angels, and all the people will go on till the Day of Judgement?