This is more of a self-defense mechanism than anything... they aren't shooting at the soldiers who volunteered for the service, they are killing thousands of un-armed civilians who have never heard of them.
As for the fatwah, Bin Ladin issued it, ask him if he really meant jihad.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.