I never have understood why they killed the woman in the car. Trigger happy after the exciting pursuit I suppose.
I can think of two explanations for the latest incident. Simple incompetence... is generally the most likely explanation for any situation involving any government agency or the military. I say that as someone who spent 25 years working for a local government in a fire department.
The less likely explanation is that the guys who are protecting Obama are as sick of him as the rest of us and have less commitment to their mission than one would normally expect. It is rather shocking that a guy who has gone looney tunes could infiltrate so far into a secure area in the Whitehouse. Kim Jong-un, Putin, Ali Khamenei, Bashar al-Assad, the leaders of Isil and all of the USA’s other greatest enemies all perceive Obama as the weakest president in the history of the USA. So I doubt whether Obama is under any increased danger because of this incident.
It’s easy to give the bums rush to a hall guard. As for the outside. The two guards were caught in transition Bad training, supervision and management.