Muslim Council of Britain secretary general Farooq Murad said the killing of soldier Lee Rigby was "a dishonourable act," adding: "No cause justifies cold-blooded murder."
Mr Murad said: "The murder of Drummer Lee Rigby was truly a barbaric act.
"Muslim communities then, as now, were united in their condemnation of this crime."
In her only television interview since the verdict, she told ITV News that she begs forgiveness from Lee Rigby's family.
A mother and daughter who witnessed the attack on Lee Rigby have told ITV News how they are still haunted by what they saw that day.
Lee Rigby's sister told ITV News that she wishes she had not talked her brother out of returning to Afghanistan shortly before his death.