This division is not one by religious affiliation, rather it separates the extremists and the peace-loving people.Therefor I'm optimistic: now a humanistic Islam is getting shaken awake. Moderate Islam needs now to finally break cover and explain how to deal with the violence-glorifying parts of the Quran. The (psychological) repression that this has nothing to do with our belief doesn't work anymore. We have to face this challenge.
Generalization is the biggest challenge that must be dealt with if we are to create spaces for constructive dialogue where muslims feel they are welcomed. This is equally true with regards to Westerners! Not all Westerners are against muslims, and not all terrorist attacks in the West are linked to Islamic jihadists.