The credibility of information obtained from open sources has always been a problematic issue for intelligence and security communities and their analysts. The same was with many academic researchers, especially in military or security issues. Modern global Jihad is primarily a doctrinal development that requires legitimacy on the part of clerics and scholars, in the form of interpretations, rulings, and preaching. It embodies the Islamists' struggle to revive the Islamic civilization through global united solidarity and brotherhood on the one hand, and the demonization of whoever the current version of the eternal enemy is, on the other. Most importantly, however, this process takes place on the public forum. Since we deal with movements and groups that are persecuted everywhere, and since they have no access to formal media, the Internet is their only alternative, and they use it in the most efficient way they can. Most importantly, these groups are above all targeting their own societies and not Western regimes and their citizens. The Internet may be used to intimidate the Western public, knowing the audiences' wide exposure to the global media and the huge effect that exposure has upon the sense of security in the West. Global Jihad must use open indoctrination in order to sustain and broaden its audience in general, and its younger generations in particular. Open indoctrination is incompatible with disinformation. Therefore, even though we should be selective and careful in our selection of which information on Jihadi web sites we follow, once we have established the authenticity of a Jihadi web site, we can be reasonably certain that the words we read from their lips are credible. The long Jihad, which the West—and indeed much of the world—is currently facing, uses the Internet to provide both Jihadists and the rest of the world a wide spectrum of diversified information. Western intelligence and security analysts can learn a great deal about modern Jihad by reading the lips of Jihadi clerics, scholars, operatives, commanders, leaders, as well as the response of their growing audience. Improving their ability to do so, and above all in the original language must be a priority.