There are lots and lots of people who support Islamic extremists besides young Muslim men. In fact, male Muslim terrorists have become a cliche, just as attacks on airliners have. If airplanes become too difficult a target, next will be shopping malls, sporting events, political rallys, shcools, church and synagogue, etc. There are so many such soft targets in America and the world that there will always be easy targets. Security is always working on repairing the last breech and never give a thought to the next one.
Second rocket fired from Gaza explodes inside Strip (Haaretz)
from the article: Appeasing high risk groups can prove deadly