The misguidance of those who believe that kufr only means disbelief
Question

                Is the idea that kufr is only disbelief an idea that came from the Murji’ah sect?
Praise be to Allah.Kufr 
          takes different forms. The Murji’ah and other followers of bid’ah (reprehensible 
          innovation) say that kufr is only based on disbelief. But this view 
          is contrary to the evidence and contrary to the truth. It is known that 
          the Messengers were sent with miracles and proof to which hearts submitted. 
          It is rare indeed that people believed that what the Prophets brought 
          was false; most instances of kufr stemmed from arrogance, rejection 
          and stubbornness. Allaah mentioned that Quraysh did not disbelieve the 
          Prophet  (peace and blessings of 
          Allaah be upon him), “but it is 
          the Verses (the Qur’aan) of Allaah that the Zaalimoon (polytheists and 
          wrongdoers) deny” [al-An’aam 6:33 – interpretation of the meaning]. 
          This happens very often. Hence the scholars divided kufr into various 
          types: the kufr of negligence and not caring; the kufr of arrogance 
          and pride; the kufr of disbelief; the kufr of hypocrisy; the kufr of 
          doubt. There is a great deal of evidence to that effect in the Book 
          of Allaah and the Sunnah of His Messenger  
          (peace and blessings of Allaah be upon him). The story of Abu Taalib 
          and the Prophet  (peace and blessings 
          of Allaah be upon him) is clear; he believed in him and he used to say, 
          “Our son does not tell lies,” but he was still a kaafir, because he 
          never made a statement of faith or followed it up with actions.