Because that's what they are.<p>From Wikipedia: "Dogma is the established belief or doctrine held by a religion, ideology or any kind of organization: it is authoritative and not to be disputed, doubted or diverged from."<p>Some examples:<p>* 4 rights constitute Free Software, not 3 or 2 or 1 but 4.<p>* Free Software is equivalent to Civil Freedom and Human Rights.<p>* Distributing software without any of these 4 rights makes the act unethical, immoral and evil.<p>* All software should be Free Software.<p>Doubt any of these and you are no true believer of the Free Software Movement.