A better line of reasoning would be based on power symmetry rather than just race.
The Tuskegee experiment happened because the black population was essentially powerless to fight back, perhaps coupled with a feeling of contempt from the ruling class towards them as a people group. Power preys on weakness.
Fast forward to the current day, and although white populations have more power than black populations on average, the ruling elite has a total asymmetrical power advantage over both populations. Therefore, they are able to experiment upon the entire population without much repercussion.
Black people understand powerlessness from their history, and therefore they know to be on guard (more hesitant). White people are less familiar with powerlessness, and can be caught off guard (less hesitant).
The Tuskegee experiment happened because the black population was essentially powerless to fight back, perhaps coupled with a feeling of contempt from the ruling class towards them as a people group. Power preys on weakness.
Fast forward to the current day, and although white populations have more power than black populations on average, the ruling elite has a total asymmetrical power advantage over both populations. Therefore, they are able to experiment upon the entire population without much repercussion.
Black people understand powerlessness from their history, and therefore they know to be on guard (more hesitant). White people are less familiar with powerlessness, and can be caught off guard (less hesitant).