Is Daryl Harper biased against the West Indies?

Daren Powell in the first Test at Jamaica.
Shivnarine Chanderpaul and Brendan Nash in the fourth Test.

Can this man really be this stupid? In either case, what the hell is he doing umpiring a cricket match?

UPDATE: Harper later proved that he held no bias against the Windies, making similarly ridiculous decisions that favoured the Windies in the final Test as an on field umpire.

Whats the point of using television referrals if the umpire looking at the screen is a damn idiot?