We do not read of Christ casting out demons of envy, murder etc. It must also be noted that the Bible speaks of people having a demon/disease, rather than saying that demons caused the disease.
Hatusomi kuwa Kristo alitoa mashetani au mapepo ya husuda, uuaji n.k. Inabidi pia ieleweke kwamba Biblia inapowasema watu wenye pepo / maradhi si kusema mashetani yaliyosababisha maradhi.