Are Muslims forbidden from making deals with Jews?

Are we forbidden to be making deals with jews? This is because certain preachers from my country accuse them that they would definitely break every promise they make.

There are no rulings about making deals with Jews. We treat them the way we treat other non-Muslims. It is true that many Jews subscribe to a moral system where non-Jews are treated as inferior and unworthy of loyalty, so this has to be taken into account.