There were many Jews on ships off the coast of the USA that weren’t permitted in. That may be part of it.
Could be a lot of politics in play then.
I don't know if the event concedes to be in the same time period as WWII but many Jews left Europe to come to America but never made it because they were dropped off in Ireland and told it was America, after they were dropped off of the ships, the ships were quickly loaded with Irish women and children that had more money in their pockets and headed out to America. That is one of the reason why there is many Irish in the United States, and Ireland has many Jews.
See: SS St. Louis.