There are 1.2 billion Muslims in the world today. Of course not all of them are radicals. The majority of them are peaceful people. The radicals are estimated to be between 15-25% [of the Muslim population] according to all intelligence services around the world.
Is this true? Are there any stats that could back her up? This number seems very high.
I haven't found sources for the whole world yet, however the numbers presented are not that surprising given that 2/3 of Western European Muslims can be considered fundamentalist or radical believers, according to a 2013 poll.
The author analyzed data from a representative survey among immigrants and natives in six European countries. Two thirds of the Muslims interviewed say that religious rules are more important to them than the laws of the country in which they live. Three quarters of the respondents hold the opinion that there is only one legitimate interpretation of the Koran.
... but misused
The key problem in the original statement is the not-so-subtle indication that fundamentalists are all potentially violent terrorists, but that's not how it goes. By the same definition a Catholic nun is probably a Catholic fundamentalist, but not necessarily a commando-style terrorist!
Without an exact definition, it is difficult to say. From the same article though, Saba Ahmed asks:
"But my question is how can we fight an ideological war with weapons? How can we ever end this war? The jihadist ideology that you talk about - it's an ideology. How can we ever end this thing if we don't address it ideologically?"
It appears that Brigitte Gabriel was speaking of jihadist, that are fighting a war to defend or spread their Muslim beliefs. With that definition, we can look at some of the polls by the Pew Research Center regarding support for suicide bombing. They have been performing this poll of Muslims in various countries since 2002, with some variation of the question below.
"Q89. Some people think that suicide bombing and other forms of violence against civilian targets are justified in order to defend Islam from its enemies... Do you personally feel that this kind of violence is:" [blank] justified
The results of those polls fluctuate quite a bit from year-to-year. For example, Indonesia fluctuated from %10-15% most years, with the Spring 2013 percentages listed below being an outlier. With Indonesia representing almost 13% of the world Muslim population, differences like that and the margin of error of +/-4% can make a big difference. The table below lists % [of world Muslim population] and Total % of Muslims worldwide that support suicide bombings against civilians in defense of Islam (I.e. the product of Muslims that answer Often/Sometimes suicide bombings are justified and that countries ratio of all Muslims.)
Of the countries that were polled, which represent half of all Muslims worldwide, 15.66% of those Muslims admitted to pollsters that it is justified to use suicide bombs against civilians to defend Islam. These "radial Islamist" would account for 8.176% of all jihadists worldwide. The low figure of the range seems reasonable, but the chart above is missing some notable countries with large Muslim populations Nigeria (4.7%) and India (10.9%). Pew hasn't polled India to my knowledge, but Nigeria has and the results were wildly different for radical Islamists (8% 2013 and 34% 2010).
... a practising Muslim who goes to mosque every Friday, prays five times a day, and who believes that the Koran is the word of God, and who believes that Mohammed is the perfect man and (four inaudible words) is a radical Muslim.
I can't find the original quote online; the existence of this definition is also alleged by a New York Times editor, who wrote here,
A blog on The Australian Jewish News quoted Gabriel as saying last year, “Every practicing Muslim is a radical Muslim.”
The claim is, at best, very poorly stated. No external sources are necessary to prove this. Consider the following quotes from the article:
There are 1.2 billion Muslims in the world today. Of course not all of them are radicals. The majority of them are peaceful people. The radicals are estimated to be between 15-25% according to all intelligence services around the world.
The claimant is drawing a line between "peaceful" Muslims and "radical" Muslims, claiming that 15-25% are radicals, while the others are peaceful.
This is re-enforced two paragraphs later:
"So why should we worry about the radical 15-25%? Because it is the radicals that kill. Because it is the radicals that behead and massacre," Gabriel said.
So the claim is that 15-25% of 1.2 billion Muslims participate in beheadings and massacres. That's 180,000,000 - 300,000,000 Muslims who are supposedly involved in beheadings and massacres.
Unless we are going to assume a huge media cover-up of Muslim-initiated beheadings and massacres, there simply are not enough beheadings and massacres to involve that many perpetrators.
Although that doesn't mean there's not some element of truth to such a claim--it only means the claim is made in very sloppy terms.
This post summarizes an article in The Weekly Standard, which in turn summarizes a book by John Esposito and Dalia Mogahed, which analyzes this issue, and includes the result of its own study, which defines a radical Muslim as those who say the 9/11 attack was “completely justified,”, and this group comprises 6.5 percent of the sample.
I can find no evidence to support (or contradict) the claim that "world wide intelligence services" support her 15-25% claim, but I stand by my belief that this is a meaningless claim anyway, as "intelligence service" is far too vague or ambiguous to possibly be meaningful.
TLDR The specific claim is confused, but with a properly-conducted survey, with meaningful definitions, we can determine how many Radical Muslims there are, and one such study found that number to be 6.5%.