Even the "wet start" story WAS TRUE, McCain doing that is not responsible for the incident. Correlation and causation are not the same thing. That I went for a walk and it started to rain doesn't mean that walking causes precipitation.

The mishap was established to be due to the F-4's ordnance mistakenly already being hooked up when it was switched to external power, causing some stray voltage to trigger the weapon.

Military ordnance is generally very stable until triggered by its fuze. If the heat from an extra-flaming start by an adjacent aircraft were enough to cook it off, you wouldn't even be able to store it.