Although it is mashechet Gittin (55b-57b) that records the stories relating to the destruction of the Temple, the famous Talmudic passage stating that the first Temple was destroyed because of the three cardinal sins of idolatry, adultery, and murder, and the second because of sinnat chinam is actually found in mashechet Yoma (9b).
Almost always, wrongdoing requires that people work together to perpetrate such. As has been accepted in the legal systems of Western countries, it is the enablers, more than the perpetrators themselves, who are viewed with greater opprobrium. Those who enable sin violate the biblical prohibition against lifnei iver, placing a stumbling block before the blind. According to Tosafot (Avodah Zara 22a, s.v. teipuk), even if one only aids and abets a rabbinic violation of the law, one nonetheless violates lifnei iver on a biblical level.
This week's d'var Torah is dedicated in honour of the upcoming wedding of Estie Roz and Avner Zeifman. May they share much happiness and built a bayit ne'eman b'yisrael. Mazal-tov to the extended families.
The hallmark of democratic societies is a strong, fair, and impartial judicial system; without one, anarchy rules. In many ways, the dispensing of justice is the fundamental difference between first-world and third-world countries, where corruption and graft is often the norm, and where disputes are likely to be settled by force.
The greatness of a person is revealed by the little things that one does. The greater the person, the more he or she is concerned with little things. Rav Yochanan ben Zakai, who was busy worrying about how Judaism could survive after the loss of Jerusalem, also pleaded with the Romans to send a doctor for Rav Tzadok (Gittin 56b), an aging pious individual who had fasted for many years as the destruction neared. In dealing with the national future of the Jewish people, he did not forget the pain of the individual.