Shiksa (pronounced shick-suh) is a Yiddish word that refers to a non-Jewish woman who is either romantically interested in a Jewish man or who is a Jewish man's object of affection.
The continued behaviors against women and non-Jews do not represent most Jews or even most Chasidic Jews. This story is about a very small fringe sect.
Frank while talking to Henry about why they did not have more kids alluded to an Irish-Catholic family in the mid 50's, suggesting that is when Frank had been born. Tom Selleck, who plays Frank, was born 10 years earlier in 1945. Henry, played by Len Cariou was born in 1939, so he is only 6 years older than Tom Selleck and would have been 16 in 1955.