Will the proposed New York City mosque ever be built?

Lets face it, this proposed mosque is facing some heavy opposition and rightly so. why build the mosque within two blocks of the deadly twin towers attack? Is this to be a shrine, to reward certain people, for the accomplishments of killing innocent people? And, not to mention the many surviving cancer patients caused by debris from the attacks? Also, how can President Obama endorse this building? Should he not stay out of the situation? American blood comes before a foreign regions religion. Question: Will the surviving family members of 911 ever let the New York City mosque get off the ground? Should we expect sabotage?