Conversation so far:
What did this lead Marc Chagall to do?
In Russia at that time, Jewish children were not allowed to attend regular Russian schools or universities.
What is the worst?
Their movement within the city was also restricted.
Chagall therefore received his primary education at the local Jewish religious school.
What is the worst with these people?
At the age of 13, his mother tried to enroll him in a Russian high school, and he recalled, "But in that school, they don't take Jews.
What did this make him try and do?
At the age of 13, his mother tried to enroll him in a Russian high school, and he recalled, "But in that school, they don't take Jews.
How did this lead to the wrong?
She offered the headmaster 50 roubles to let him attend, which he accepted.
What did this make him do?
She offered the headmaster 50 roubles to let him attend, which he accepted.

Question: What did lis lead them to believe?
Self-contained rewrite: What did offering headmaster money lead Chagall to believe?