Probably the most important of them all is that, he is not of the Ahla Sunnah, he propogates salafee idealogy, and a sincere student of Islam should avoid him totally, and listen to the likes of Yusuf Al Qaradawi, Taqi Usmani, Tahir ul Qadri, Habir Umar bin Hafiz, Habib Al Jibri etc. The true scholars who teach according to the Ahla Sunnah and the correct aqida.