"As time passed Friends found themselves in closer contact with Jews in commerce, banking, insurance and scientific societies. They had much in common. Both believed that they could have direct access to the divine without human intervention. They both worked together for the abolition of slavery; their marriage regulations needed the endorsement of the state; they were both smallish scattered communities. Quakers had commercial and family links with coreligionists in North America; Jews had similar links with communities scattered all over the world. Both emphasised religion as a practical path of ethics and in both there were splits over doctrinal differences. Both had an uneasy relationship with the state, and were excluded from university and Parliament. By the end of the nineteenth century, however, Quakers were respectable and legal. Jews, on the other hand, on average a much poorer community, had to struggle to gain social acceptance."
More in an outstanding article at http://thefriend.org/article/quakers-and-jews/
"There was once a small Jewish population in an area which was dominated by Quakers. The Jews there had their own synagogue, and found their Quaker neighbors to be friendly. All in all, the two populations got on very well.
One summer, there was a terrible fire and the synagogue was completely burned to the ground. The Jews were devistated, and began raising money to build a new synagogue. The Quakers quickly saw their plight, and also decided to lend a hand. They got together and had a meeting and decided that until the new synagogue could be built, the Jews should be able to pray in their church on Friday nights and Saturdays, since they only needed the church on Sundays. Furthermore, all funds placed in the charity box would go toward the rebuilding of the synagogue. The Jews of the community, and their Rabbi, were overwhelmed by the generous offer - and so it was."