I agree. Friendly fire incident happen in the fog of war. They've happened before and as we saw with Pat Tillman recently they go right on happening. Nothing is to be gained by raking this matter over the coals again and again. We have bigger fish to fry in the Middle East.
That's great, but Pat Tillman happened on a squadron level in a combat situation.
The Liberty was attacked out at sea, and there were no arab planes in the area to shoot back. Taking a pass to identify the ship wasn't too much to ask for, IMO.