Written by DCist contributor Rob Birgfeld It was just the Cardinals. No doubt about it. But these Cardinals came in confident and 2-0 for the first time since 1999, and no one had any idea what to expect from our Redskins. The Week 1 portrait of ineptitude or the Week 2 team that showed offensive promise? Well, the Redskins gave fans a little of both yesterday at FedEx Field on their way to a…