FBI agents know from nothing about Sharia?

Which explains their cutting off investigation of Mateen after two interrogations?

Former FBI Agent John Guandolo said the FBI mistakenly closed its investigation because it had no idea how to respond to jihadist threats because the bureau does not teach agents about Islamist doctrine, such as Sharia law, that is used as a guide for terrorist operations and activities.
“This investigation was closed because FBI leadership has systematically refused to look at and teach Sharia to its agents because it is getting its advice on Islam from Muslims who are hostile to us and our system of government,” Guandolo said.

Serious charge, reflecting Obama’s see-no-evil approach to never-named Islamic terrorism.  

As in this:

In the hours after the rampage, President Barack Obama claimed that Mateen’s motives are “unclear,” even though he admitted that the carnage was an “act of terror.”

He moved to blame the national debate on the Second Amendment and possession of firearms by citizens, however, saying “we have to decide if this [an American with guns] is the kind of country we want to be.”

If agents ignore Islamic motivations, they miss a lot. There’s a refusal to connect dots here?