“Acting white” is usually black code for “being successful”.
If blacks wanted to actually change their reputation, they would tirelessly work to succeed in life, thus making the “acting white” charge nonexistent.
But since 19 out of 20 blacks vote Democrat, they will never work to change their reputation, and “acting white” will always remain a ridiculous pejorative in the black community.
“Oreo” isn’t just a cookie. In some circles, it’s intended as an insult.
Any black person can “act white” if they studied hard, got good grades, etc.