on the plane a person came to us ... He said he hates Israel he hates us hates Jews etc... bla bla bla and then boarded the plane.
First I would ask how he then boarded the plane when he was already on the plane.
Second I would ignore him as an inconsequential arsehole who is displaying his sphincturality very well to all and sundry, unless he persisted or became physically aggressive. Presumably he is on a plane with mostly Jewish people so it's a different situation to him picking on you when you are isolated.