Contradictions of ibn abd al-Wahhab in the excommunication of Muslims

Ibn 'Abd Al-Wahhab adduced a reasons for Muslims excommunication (Takfir), in this article we first list his reasons and then we express the contradictions in themand finally we prove that these reasons, despite the human and financial costs for Islam has serious problems namely contradiction. These contradictions will be proved with 3 titles: 1. Follower (Muqallid) or religious authority (Mujtahid) 2. Religious permit to implore to a creature in what it has ability in (jawaz istighatha bi-makhlugh fima yaghder alaih) 3. Consensus Takfir (Excommunication) or Ijtehadi. The contradiction does not mean that he said a word in one place and said the opposite of that word in another place, but these contradictions are mainly in Ibn 'Abd Al-Wahhab’s opinions.