The failure of the opposition to portray Sarawak governor Abdul Taib Mahmud as a 'bad guy' of the BN is one of 'seven sins' the opposition committed in the May 7 state election, an academician has argued.

"One of the crucial mistakes of the opposition was its refusal to use Taib as the number one target. They went after Chief Minister Adenan Satem instead," said political analyst James Chin.