Here is his 2008 testimony before Senator Liebermans Homeland Security Committee (this is an 8 page pdf) . It would seem that even though his advocacy of a purely personal Islam devoid of all political Islamism is good, on the other hand, his representations about Shariah in the Lieberman testimony and about Islam (etc) are all (pretty much without exception) not factually based; including his assertions about the Shariah State.
Nawaz speaks for 38 minutes and the Q and A is approx 18 minutes.
Proverbs 12:
5 The thoughts of the righteous are right: but the counsels of the wicked are deceit.
6 The words of the wicked are to lie in wait for blood: but the mouth of the upright shall deliver them.
7 The wicked are overthrown, and are not: but the house of the righteous shall stand.