Offering condolences to the family of a sinner
Question

                Sometimes a person dies by committing suicide; or a person drinks intoxicants in such great amounts that this leads to death; or a person is attacked to put an end to his evil. Is it permissible to console the mother or other relatives of a person who dies in one of these ways? I am very confused about this matter. Should I go (and offer condolences) or not?
Praise be to Allah.There is nothing wrong with offering condolences, in fact it is mustahabb, 
          even if the person who died was a sinner who committed suicide etc., 
          just as it is mustahabb to offer condolences to the family of a person 
          who was killed in retaliation (qasaas, i.e., a sentence passed in a 
          sharee’ah court allowing the family of the murder victim to execute 
          the murderer) or as a hadd punishment, such as a married adulterer, 
          or the family of a person who drank himself to death. There is nothing 
          to stop us offering condolences to their families, or making du’aa’ 
          for them and other sinners and asking for forgiveness and mercy for 
          them. They should be washed and prayed for, but not by prominent figures 
          in the Muslim community such as the ruler or qaadi etc. Rather some 
          of the people should pray for them in order to deter others from committing 
          the evil deeds that they did. As for one who dies because of the aggression 
          of another, he has been killed unlawfully, so the funeral prayer should 
          be offered for him and du’aa’ should be made for him, if he was Muslim. 
          The same applies in the case of one who is killed in retaliation (qasaas), 
          as stated above, the funeral prayer should be offered for him and du’aa’ 
          should be made for him, and condolences should be offered to his family, 
          if he was Muslim and there is no reason to assume that he was an apostate. 
          And Allaah is the Source of strength.