The fact that ALL imams must preach the virtues of ALL forms of jihad, (especially violent jihad) is hardly surprising considering that the most sacred Islamic text, The Quran, simply demands it from ALL muslims.
The Victorian Supreme Court has heard how two men accused of planning a terrorist attack in Sydney were lectured by a sheikh on the values of jihad.
It is not just a matter that "some" imams may misinterpret Allah's orders. Jihad is simply the most SACRED and BASIC Islamic duty. It always must come first.
QURAN - 9:111 Lo! Allah hath bought from the believers their lives and their wealth because the Garden will be theirs: they shall fight in the way of Allah and shall slay and be slain. It is a promise which is binding on Him in the Torah and the Gospel and the Qur'an. Who fulfilleth His covenant better than Allah ? Rejoice then in your bargain that ye have made, for that is the supreme triumph.
Everything else (including the five pillars if Islam) comes second
In the recording, the Muslim leader spends an hour lecturing Saney Aweys and Abdirahman Ahmed on jihad, or holy war.
He tells the men to choose between two realities - Christianity or Al Qaeda. (source)
Jihad for Allah simply means destruction of Dar al Harb (non-Muslim world) by ANY means, and violent Jihad is the best strategy to achieve this noble goal.