The threat is of terrorism, not from ordinary decent Muslims but from the "several thousands" of Islamists who see ordinary folk as targets, and the hundreds now committing atrocities on the people of Iraq and Syria with a group shunned by al Qaeda as too extreme.

Strangely, I am not reassured by your dismissal of the statements of

The government.
Also Labour.
Also MI5.
Also Scotland Yard.
Also journalists working in Iraq and Syria.
Also the leader of the Free Syria Army.
Also ISIS itself.
Also the individual Jihadists.