Onkelos the convert was the nephew of Titus. He went and raised Titus, Bilam and others from the dead and asked them questions about the Jews and the punishments they each received for their actions. The Mount of the King was destroyed because of a rooster and a hen. How and why were the people of Kfar Sichniya in Egypt destroyed? Beitar was destroyed (during the Bar Kochva rebellion) on account of a shaft of a carriage. Zecharia the prophet was assassinated by the Jews who did not want to accept his rebuke. After his death, his blood was boiling and rising from the Temple floor and wouldn't stop. This led Nevuzaraden (in the destruction of the first Temple) to slaughter millions of Jews until his death was avenged. Nevuzaraden ultimately converted to Judaism as did the descendants of Haman and Sanchereb who became Torah scholars (among them, Shemaya and Avtalion). There are five different explanations of the verse "For you we have died all of the day" - some relate to stories of the destruction (the children who were taken by boat to engage in prostitution who committed suicide, seven sons of one woman who were killed for not bowing down to idols) and others to circumcision and learning Torah.