I don't see all the muslim community carrying out attacks every single day, not even endorsing them. Most of them actually condemn those attacks, carried out by a minority. Don't forget that terrorist attacks were not only carried out by muslims - look at Northern Ireland, Corsica etc. Attacks in these communities were carried out by christian people, yet we are not asking the question of whether all christians are terrorists...
The fact is that some particularities of Islam make it easier to justify violent acts against others. When such rhetoric gets to "weaker" people, they can be turned into fanatics quite easily, leading them to conduct such horrible acts.