A horrific shooting in Jersey City may have occurred two rivers away.

But it hit close to home in this neighborhood, where two of the victims of a shooting now being investigated as a terrorist attack, were mourned by hundreds in a funeral procession held on Wednesday night.

"This horrible act of senseless violence, this act of terrorism, anti-Semitic hate has come right home here to this neighborhood in Brooklyn and to our city," said Mayor de Blasio.

So Mayor de Blasio and NYPD top brass met with Jewish leaders in Williamsburg on Thursday to assure this community that his administration, the NYPD could keep them safe.

"You have our commitment that the men and women of the New York City Police Department will be there to keep the Jewish community safe," said Police Commissioner Dermot Shea.

In stark language the mayor warned that hate and anti-Semitism is on the rise. That the horrors of another century could repeat themselves.

"If it happened in isolation it would still be horrible. It is not happening in isolation. There is a larger danger and it is growing," said de Blasio.

Much of that, the mayor says, is coming from right-wing extremists.

And to chill that, the mayor called out social media companies, companies he says are profiting off of hate.

"They are unregulated utilities. They must be regulated. They can't keep claiming to be innocent, to be neutral. They are not. They are making a huge amount of money off of hate speech," said de Blasio.

City officials say residents of Williamsburg should expect to see an increased police presence here in Brooklyn at least for the near future.