Praying for the kaafir to be guided or else be punished by Allaah
Question

                What is the ruling on praying for Allaah to guide some wrongdoers and evildoers or kaafirs, and if He does not guide them, may He seize them with such a penalty that comes from One exalted in power and able to carry out His will? Is this du’aa’ permissible? Or does it come under the heading of letting Allaah choose?.
Praise be to Allah.
    This is not letting Allaah choose, rather it is asking for 
    them to be guided by Allaah, whilst referring the matter of their being 
    guided to His will and wisdom. If that is done for them then praise be to 
    Allaah, otherwise may Allaah protect us against their evil by seizing them 
    with such a penalty that comes from One exalted in power and able to carry 
    out His will, as a punishment for their wrongdoing and so as to cleanse the 
    earth of their filth. So it is a permissible du’aa’. 

    And Allaah is the Source of strength, May Allaah send 
    blessings and peace upon our Prophet Muhammad and his family and 
    companions. 

    Standing Committee for Academic Research and Issuing Fatwas