Historical clue formulations

• Comic who said "If you want to read about love and marriage, you've got to buy two separate books" — 2018-12-05
• *Billy Crystal's "Memories of Me" co-star — 2011-07-20
• Comic who said "A short summary of every Jewish holiday: They tried to kill us. We won. Let's eat" — 2011-01-02
• He said "Marriage is nature's way of keeping us from fighting with strangers" — 2007-01-20