After a few scrappy defensive performances, the Thunder’s faults are showing. After stringing together a few inspiring defensive performances, Oklahoma City’s team defense is turning into a point of weakness rather than a strength. At this point, the Thunder’s defense, or lack of defense, is becoming hard to ignore. The Thunder currently rank 20th in the NBA in defensive rating right behind the Charlotte Hornets. Oklahoma City ranks in the bottom three in both opponents second chance points and opponents paint points. The Thunder have been torched on the perimeter lately, giving up massive single-quarter outputs and dropping the Thunder’s…