Would you be shocked to learn that the NRA endorsed a candidate that accused our Marines of cold blooded murder?
Do you mean Murtha was endorsed following his false accusations against our marines, or after? If so, I don’t get it because the NRA usually endorses candidates—at least for the last 25 years— that share most real American values.
The NRA endorses candidates based on the Second Amendment. Since you don’t regard the Second Amendment as a primary issue, you were wrong to belong to them in the first place.
By the way, some people will always an excuse to do nothing.