Ben feels this event both physically and mentally - with his whole self - by way of the Force. It causes him pain.
This leads me to consider the effect on a Jedi of widespread war, as at the time of the Clone Wars. It would present a constant barrage of emotions and sensations from all sides.
It also leads me to consider how a Jedi would be affected by the taking of a life. If a Jedi strikes a living opponent (i.e. not a droid) down in battle, wouldn't that provide the same sensation? Perhaps not as overwhelming but possibly sharper due to being at the centre of the disturbance.
Jedi only use the Force for knowledge and defence, never for attack. Perhaps it's not just a principle. Perhaps it is also because the consequences are felt by the Jedi through the Force. Fear, pain, anger can all be felt, they are experienced through the Force.
Any thoughts, people?