It is not only the responsibility of the Muslim community to report suspected terrorists, it is all of our duties as citizens of the world. Just because they are Muslims does not mean they have their ears to the grind stone. Most of them are like us and have no affiliation with terrorists.
No, Donald Trump is not correct to accuse everyone following the Muslim faith of not turning in suspected terrorists. It's ridiculous to assume that every Muslim in America would be aware of terrorist activity as they themselves do not have ties to terrorist organizations. People committing acts of terror in the name of a particular religion are often mentally ill and their beliefs are not shared amongst those in the religious community that they proclaim to be acting in behalf of.
Donald Trump has misspoken many times during his time on the campaign trail. He presents statements as facts without any sort of source to back those statements up, and many people have been easily been able to prove him wrong. To accuse all Muslims of not turning in terrorists is to accuse all Muslims of knowing a terrorist, which is a gross assumption to make. There are Muslims in many countries across the globe. There are more regular people in the world than terrorists. The vast majority of those who are Muslim reject those who claim to perform acts of terror in the name of their religion. They say that's not what their religion stands for.
Donald Trump was wrong to accuse all American Muslims of not reporting suspected terrorists. The majority of Muslims in America are opposed to terrorism, and would report suspicious activity. Furthermore, Trump may actually be alienating the very communities that are critical to fighting terrorism in the United States. In short, Donald Trump's comments about Muslims are wrong.