Then there is no point trying to "convince" him, turn the tables, ask him if HE has any proof that wahabism is a sect . BTW I believe that he is the third type, he just wont reveal it.
I have done it two years back. He doesn't come with proof but comes up with typical western lies about Muhammad bin Abdul Wahab and his movement.
BTW I believe that he is the third type, he just wont reveal it.