Yes, beliefs are not inconsequential. They can be and often are catastrophically consequential when held absolute in the absence of evidence or indeed in the face of contrary evidence, as religious beliefs are.
"Evil spirits" were once widely (and in some areas still are) believed to be responsible for the propagation of disease. One of the, if not THE greatest advance in medicine was the introduction of the Germ Theory of Disease -a """Belief""" arrived at through the scientific method. This is just one of innumerable examples of the benefit of believing things that are arrived at by gathering observable, empirical and measurable evidence subject to specific principles of reasoning, experimentation, and the formulation and testing of hypotheses instead of believing things based on myth, superstition and unctuous dispensations by ancient and modern charlatans i.e. religion.
Apologists complain that the following Quranic quotes are willfully taken out of context by Islam-bashers:
Quran 8:12: Instill terror in the hearts of the unbelievers. Strike off their heads and cut off fingers and toesQ4:89: Take not infidels as friends until they fly in Allah's way; but if they turn back, seize them, kill them wherever you find themQ9:5: Fight and kill the disbelievers.
So, did Bin Laden and associates also take these preachments out of context to let them serve as inspiration and justification for their activities? Perhaps their context then is not sufficiently persuasive to prevent them from acting as a call to violence. Such beliefs, then, ought come equipped with warning labels since their believers lack the wit to recognize their absurdity.
More information about text formats