A friend of mine works for a Christian organization that works mostly with Jewish people in Paris. Even before the recent terror attack, Jews have been leaving in greater numbers. He thinks he may have very few Jewish people to minister to if it stays at these rates.
Most Jewish (well any non Muslim) avoid Muslim neighborhoods when it can be helped. Being openly Jewish on the street isn't a good idea either. So Fox News wasn't totally wrong about that story that they have been ripped on for reporting.
His sister was recently attacked and robbed (before the terror attack) on the Paris subway by Muslim thugs too. So having no Jews won't stop Muslims from being aggressive.