The article title and content are misleading, which is no surprise. Media love to sex things up. The word "accidental" was used in the article regardless, yet the title is politically-loaded. We have no idea how true this article is or if it was in play, murdered staff noted they were guarded by locals and those local guards were taking photos of the compound. The guards knew what they were guarding, obviously, it's not like someone came along and said, "Hey this is a US compound," and they're like "ORLY? We had no idea."
The staff there requested more security and didn't get it, and also, they were not told of credible threats in the area. Both of those are on Obama, no matter how you slice it and no matter how many times you keep playing those bogus 47% commercials.