Jothar,
Allow me to clarify,
Here is an example of what i am asking
In 2008 there was a terrorist attack in the mercaz harav yeshiva in yerushalyim 8 bochrim were killed. The terorist was going strong untill an IDF SOLDIER shot the terrorist dead and stopped him. (there are many other examples like this one)
If learning protects bderech hateva the same amount as a soldier does why did a soldier stop the terrorist? the learning that went on in the yeshiva should have been enough.