Only because in your mind and Dubya's mind political expediency supercedes real patriotism.
The borders CAN be buttoned up. But that means an actual plan must be drawn, resources must be utilized and the Latino vote risked.
However, Dubya Bush and the RINOs have decided power is far more important than principle.
We could seal the border if we wanted to, but apparently it's going to take a smuggled WMD exploding in one of our liberal cities to make that happen.