Everybody needs to do as much as they can to prevent extremist attacks. There is no place ion this world for people to be slack about reporting crimes that are about to occur that they know about. It is disgraceful if you are an American citizen to engage in such behavior.
There is no question that the overwhelming majority of American Muslims reject extremist ideology. Also, most Muslims in America would report extremist activity within their community. However, if someone is being radicalized in a Mosque, he should be reported to authorities. Likewise, if someone has a relative or friend that has been radicalized, this needs to be brought to the attention of law enforcement as well. In short, everyone, not just Muslims should do more to prevent terrorist activity.
Yes, Muslims should do more to prevent terrorist activity. Terrorism activity affects the Muslim community because it is stereotypes and the people of this community may be subjected to discriminatory treatment if they do not start to do more to prevent terrorist activity. The Muslim community should always warn authorities of possible extremists.
No, Muslims should not be expected to do more to prevent terrorist activity. You cannot hold an entire community accountable for the acts of an individual who's beliefs are not in line with those of that community. Everyone, regardless of religious affiliation, should do what they can to prevent terrorist activity.