The WaPo article is titled ‘Both San Bernardino attackers pledged allegiance to the Islamic State’ because the Facebook post says ‘we pledge’. Who says the ‘we’ only applies to two people?

Via WaPo:

Federal authorities believe the Facebook posting from one of the attackers who killed 14 people here last week was made on behalf of both shooters, according to several senior U.S. law enforcement officials.

The Facebook posting said, “We pledge allegiance” to the leader of the Islamic State, using the name Khalifah Abu Bakr al-Baghdadi Al Qurashi, the emir of the self-proclaimed Islamic State. Some of the text in the posting appeared to be garbled, one official said.[…]

The neighbor, Enrique Marquez, legally purchased the rifles — semiautomatic AR-15s manufactured by DPMS and Smith & Wesson — in California, officials say. The FBI is still investigating whether Marquez sold these rifles to Farook, his former neighbor, according to the officials.

It is unclear when Farook obtained them, said the officials, who spoke on the condition of anonymity to discuss an ongoing investigation.

Marquez, who works as a security guard at Walmart and had lived next door to the Farook family for years, could become a subject of the investigation depending on what the FBI learns, one official said. […]

Marquez checked himself into a mental health facility Friday. Authorities said he has since checked out and been questioned by the FBI, which is interested in learning about the guns he provided as well as whether he had any knowledge of the plot. The FBI is also investigating whether Marquez and Farook had talked about getting into “badness,” said another of the officials.

Reports on Monday suggested that Marquez and Farook may have had another connection in addition to being neighbors. An official with the Islamic Center of Corona-Norco, in Corona, Calif., the mosque Syed Farook’s brother Raheel regularly attended, said that he believed Marquez periodically attended the center in the past.

Yousuf Bhaghani, a senior official at the center, said in an interview Tuesday that he had not interacted with Marquez himself, but that other members he had spoken with said they recalled Marquez occasionally praying at the mosque four or five years ago.

Those who interacted with Marquez described him as a “decent person,” Bhaghani said. “They didn’t see anything which caused alarm.”

Enrique Marquez may well be Filipino or of Filipino descent, as the license plate on his car says ‘Pinnay’, which is slang for Filipino, and would fit the Spanish sounding name, with the Asian look.