What _is_ known is that the two scum intended to attack a small group of people banded together to flex their First Amendment rights, rights which the entire liberal pantheon of media talking heads, dead-tree publishers, Hollywood pundits, and even the asshat Occupying the White House claim don't exist when it comes to talking about islam and muslims. Pam Geller and the American Freedom Defense Initiative was sponsoring a contest for cartoonists, where the object was to draw a cartoon of mohammed, the child-molesting "Prophet" of islam.
One of the tenets of islam, per the qu'ran (their "holy" book, for those of you late to the show - you may have seen it written as 'Koran') is that it is not permitted to make any drawing or other visual depiction of Allah or his "Prophet" [PBUH is usually added any time he is mentioned. This stands for "Peace Be Unto Him". I prefer to parse it as "Piss Be Unto (onto) Him".] IIRC, the penalty for drawing or painting him is death.
As we have seen in countless Western (cowboy) movies, when a horse is injured (usually a broken leg, which was pretty much impossible to fix back in that era), it was put to death. Gary Larsen, that amazingly weird cartoonist, drew a cartoon of a hospital ward full of horses, each with a different disease or injury. The veterinarian would look at the chart, but the treatment was always the same - another man walking behind the vet, shooting the horse.
islam (I refuse to respect it with a capital "I") treats violations of the edicts of the qu'ran in the same way - almost every one calls for death. Some by stoning, some by beheading. Homosexuals are hung (by the neck, you pervert!), and some other violators are/have been burned to death. For any non-muslim, or any muslim who rejects islam, thereby making him a non-muslim (duh), the penalty is death. These few who have rejected islam are known as apostates, and the qu'ran says they are worse than infidels, for they have known true islam and have turned away.
Back in 2005, muslims rioted and attacked people because some Danish cartoonists drew a number of cartoon likenesses of mohammed for the political section of a Danish newspaper. Several of the cartoonists were attacked by muslims who were trying to kill them.
Several hundred people around the world died due to muslim rioting in various countries. Because of this, ignorant liberal fools all across the planet called for restrictions on freedom of speech. In a number of European countries - and even Canada - speaking out against islam and the atrocities it engendered and supported was deemed "hate speech". The liberal/progressive asshats insist that because islam is supposedly a religion (it is actually an ideology, masquerading as a religion), it should be illegal to speak out against it. This actually became law in a number of countries, one of the worst (believe it or not) being Great Britain, where a man running for office was arrested for quoting Winston Churchill during a political rally (he quoted a Churchill statement concerning islam).
Enter Pam Geller. She heads up an organization called the American Freedom Defense Initiative. One of her primary aims is to counter islamic/muslim propaganda against Jews, especially Israelis, with true facts about islam. Recently, she has been successful in forcing various cities to post advertisements AFDI has bought showing the truth about islam, islamic jihad, and the intolerance of islam for all other religions and non-muslim peoples. She had to take various cities to court to enforce the right of free speech, and has won. The lying sacks of human feces who operate the Southern Poverty Law Center - you know, the ones who "consult" with law enforcement agencies all over the country, telling them that you are a domestic extremist/terrorist if you are a veteran and supported Ron Paul - claim AFDI is a "hate group". This from a group of shysters who scam money from elderly people on limited incomes who think SPLC is actually fighting discrimination.
What is especially interesting is that, while the fuzzy-minded liberals are screaming "hate speech" at those (including former muslims) who speak out about the atrocities perpetrated by islam - all provable facts, like the beheadings done by ISIS - they are amazingly silent about the attacks upon Christianity, such as the "artist" who won kudos for his exhibit of a photograph of a crucifix inside of a jar full of urine. The exhibit was sponsored by the National Endowment for the Arts, which claims it does not control content. (I have $1000.00 that says they would not permit cartoon depictions of mohammed at any of the exhibits they support or arrange.)
So, this brings us back to Pam Geller, in Garland, Texas providing a venue for a group of cartoonists to utilize their right to free speech. AFDI provided a $10,000.00 prize for the best cartoon of mohammed. The winner, incidentally, was a former muslim, Bosch Fawstin. His cartoon was pretty mild, compared to others, such as those posted by the Danish newspaper.