Last time I checked, Muslims come in other wrappers than just Arab form. Come to think about it, the failed bombings were done by non-arab men.
Also, who bombed the Alfred P. Murrah Federal Building in Oklahoma City?
Terrorist do not simply come from the Middle East or Islamic faith, and setting our defense to combat ONLY people with a Middle Eastern background is foolish. North African's are also known to have actually carried out bombings against the US, just for example.
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone