Which of the following contributed to the genocide during the Holocaust
1. Anti-Semitic beliefs and attitudes
2. Nazi ideology and propaganda
3. Adolf Hitler's leadership and emphasis on the extermination of the Jewish population
4. The establishment of concentration camps and death camps
5. The collaboration of local authorities and citizens in Nazi-occupied territories
6. The implementation of laws and policies that marginalized and targeted Jewish people
7. The indifference or complicity of other countries in the face of the Holocaust