Geller has decided, at the very real risk of her life, to confront the islamists head on. Others have done the same thing, like Hersi Ali, Geert Wilders, Wafta Sultam, Brigette Gabriel and their lives have been under threat as well. But no one has suffered the invective in America, from some quarters, as has Pamela Geller, and I suspect that's because she is a Jew.
Killing one person is murder, killing 100,000 is foreign policy
Many people, as we see from the PEN withdrawals, didn't support Charlie Hebdo either but Charlie was a bit player in all of this also.
The idea is to silence any criticism of Islam, hype "Islamophobia, have Muslims treated as separate when the conditions favor them and, over the long term, Islam will prevail. Geller and the rest, most former Muslims, understand this, and you can also discover this by just listening to Islamist leaders. They make no secret of it.