Any new information about reality, if properly understood (that part is important), can only cause people to become more ethical.
Suppose Alice is a hates tall people with a passion. Then, she learns about a gathering of vulnerable tall people. She properly understands all the relevant consequences of this fact. Including that now she can act on her hatred!
We have even better counterexamples against
Suppose Alice is a hates tall people with a passion. Then, she learns about a gathering of vulnerable tall people. She properly understands all the relevant consequences of this fact. Including that now she can act on her hatred!