Final answer:
Mama probably believes that East Berliners did not contest the Berlin Wall because they felt powerless and feared repercussions, signifying a broader environment of suppression and control.
Step-by-step explanation:
Mama likely thinks the reason East Berliners didn't fight the Berlin Wall is because they had no choice and it's easier not to disobey. This was a period marked by the severe restriction of freedom and the use of force to maintain the status quo. The Iron Curtain and the Berlin Wall both served as not just physical barriers, but also as psychological ones, underscoring a stark divide between the Communist East and Capitalist West. East Berliners may have felt powerless against the might of the Soviet-backed authorities and feared the consequences of dissent.